diff --git a/.github/workflows/rbc_test.yml b/.github/workflows/rbc_test.yml
index 3d2b1f35..af82f5c0 100644
--- a/.github/workflows/rbc_test.yml
+++ b/.github/workflows/rbc_test.yml
@@ -114,13 +114,6 @@ jobs:
         llvm-version: ['11.1']
         heavydb-from: [conda]
         include:
-          - os: ubuntu-latest
-            python-version: '3.11'
-            numba-version: '0.57'
-            llvm-version: '14'
-            heavydb-version: '6.2'  # if changing this value, update the condition
-                                    # on "Run rbc tests [LLVM mismatch]"
-            heavydb-from: conda
           - os: ubuntu-latest
             python-version: '3.11'
             numba-version: '0.57'
@@ -249,7 +242,7 @@ jobs:
 
       - name: Run rbc tests [conda]
         shell: bash -l {0}
-        if: matrix.heavydb-from == 'conda' && ! (matrix.numba-version == '0.57' && matrix.heavydb-version == '6.2')
+        if: matrix.heavydb-from == 'conda'
         env:
           HEAVYDB_SOURCE: ${{ matrix.heavydb-from }}
           EXPECTED_PYTHON_VERSION: ${{ matrix.python-version }}
@@ -261,19 +254,6 @@ jobs:
           pkill -f heavydb
           mamba run -n rbc pytest -sv -r A rbc/tests/ -x --ignore rbc/tests/heavydb
 
-      - name: Run rbc tests [LLVM mismatch]
-        shell: bash -l {0}
-        if: matrix.numba-version == '0.57' && matrix.heavydb-version == '6.2'
-        env:
-          HEAVYDB_SOURCE: ${{ matrix.heavydb-from }}
-          EXPECTED_PYTHON_VERSION: ${{ matrix.python-version }}
-          EXPECTED_HEAVYDB_VERSION: ${{ matrix.heavydb-version }}
-          EXPECTED_NUMBA_VERSION: ${{ matrix.numba-version }}
-          RBC_TESTS_FULL: TRUE
-        run: |
-          mamba run -n rbc pytest -sv -r A rbc/tests/heavydb/test_heavydb.py -k test_numba_heavydb_llvm_mismatch
-
-
       - name: Show Heavydb conda logs on failure [conda]
         shell: bash -l {0}
         if: failure() && matrix.os == 'ubuntu-latest' && matrix.heavydb-from == 'conda'
diff --git a/doc/envvars.rst b/doc/envvars.rst
index 28ccedef..1bc34fb6 100644
--- a/doc/envvars.rst
+++ b/doc/envvars.rst
@@ -14,9 +14,3 @@ Debugging
 
     If set to non-zero, insert debug statements to our implementation
     of Numba Runtime (NRT)
-
-.. envvar:: DISABLE_LLVM_MISMATCH_WARN
-
-    If set to non-zero, RBC will not raise a warning on Numba/HeavyDB LLVM
-    mismatch version. Numba 0.57 uses LLVM 14 and may produce IR that
-    older versions of HeavyDB (< 7.0) cannot read.
diff --git a/rbc/heavydb/remoteheavydb.py b/rbc/heavydb/remoteheavydb.py
index 1eed9771..919bc7e4 100644
--- a/rbc/heavydb/remoteheavydb.py
+++ b/rbc/heavydb/remoteheavydb.py
@@ -26,7 +26,6 @@
 from rbc.targetinfo import TargetInfo
 from rbc.irtools import compile_to_LLVM
 from rbc.errors import ForbiddenNameError, HeavyDBServerError
-from rbc.warnings import LLVMVersionMismatchWarning
 from rbc.utils import parse_version, version_date
 from rbc import ctools, typesystem
 
@@ -1268,35 +1267,8 @@ def _make_udf(self, caller, orig_sig, sig):
             name + sig.mangling(),
             atypes, rtype, annotations)
 
-    def _check_llvm_version(self):
-        # check LLVM version before compiling to LLVM
-        flag_name = 'RBC_DISABLE_LLVM_MISMATCH_WARN'
-        flag = int(os.environ.get(flag_name, False))
-
-        if not flag:
-            target = self.targets['cpu']
-            server_llvm_version = target.llvm_version
-            client_llvm_version = llvm.llvm_version_info
-
-            if (server_llvm_version[0], client_llvm_version[0]) == (11, 14):
-                c_llvm = '.'.join(map(str, client_llvm_version))
-                s_llvm = '.'.join(map(str, server_llvm_version))
-                msg = (
-                    f'The client LLVM version ({c_llvm}) is greater than the server '
-                    f'LLVM version ({s_llvm}). This is known to be unsupported. '
-                    'Please, downgrade to a previous release of Numba that uses the '
-                    'same LLVM version as the HeavyDB server. For more information, '
-                    'see the table below:\n\n'
-                    'https://github.com/numba/llvmlite#compatibility\n'
-                    'https://github.com/heavyai/heavydb#dependencies\n\n'
-                    f'To suppress this warning, run RBC with {flag_name}=1 '
-                    'flag enabled.')
-                warnings.warn(msg, LLVMVersionMismatchWarning)
-
     def register(self):
         """Register caller cache to the server."""
-        self._check_llvm_version()
-
         with typesystem.Type.alias(**self.typesystem_aliases):
             return self._register()
 
diff --git a/rbc/irtools.py b/rbc/irtools.py
index f6ff752c..3cfb5665 100644
--- a/rbc/irtools.py
+++ b/rbc/irtools.py
@@ -162,8 +162,6 @@ def _get_host_cpu_features(self):
                        'prefetchwt1', 'f16c', 'ssse3', 'sgx', 'shstk', 'cmov',
                        'avx512vbmi', 'amxint8', 'movbe', 'avx512vp2intersect',
                        'xsaveopt', 'avx512dq', 'sse2', 'adx', 'sse3'],
-            (14, 11): ['crc32', 'uintr', 'widekl', 'avxvnni', 'avx512fp16', 'kl',
-                       'hreset'],
             (11, 8): ['tsxldtrk', 'amx-tile', 'amx-bf16', 'serialize', 'amx-int8',
                       'avx512vp2intersect', 'tsxldtrk', 'amx-tile', 'amx-bf16',
                       'serialize', 'amx-int8', 'avx512vp2intersect', 'tsxldtrk',
diff --git a/rbc/tests/heavydb/test_heavydb.py b/rbc/tests/heavydb/test_heavydb.py
index bfbdde78..f2248615 100644
--- a/rbc/tests/heavydb/test_heavydb.py
+++ b/rbc/tests/heavydb/test_heavydb.py
@@ -5,7 +5,6 @@
 import numpy as np
 import pytest
 
-from rbc.warnings import LLVMVersionMismatchWarning
 from rbc.errors import HeavyDBServerError, UnsupportedError
 from rbc.tests import assert_equal, heavydb_fixture
 from rbc.typesystem import Type
@@ -875,36 +874,3 @@ def rbc_test_non_admin_user_udf(x):
     # clean up:
     heavydb.sql_execute(f'DROP DATABASE IF EXISTS {dbname};')
     heavydb.sql_execute(f'DROP USER IF EXISTS "{user}";')
-
-
-@pytest.mark.parametrize('kind', ('udf', 'udtf'))
-def test_numba_heavydb_llvm_mismatch(heavydb, kind):
-    heavydb.reset()
-
-    # only run this test on a specific environment
-    target_info = heavydb.targets['cpu']
-    server_llvm_version = target_info.llvm_version
-    client_llvm_version = llvm.llvm_version_info
-
-    if (server_llvm_version[0], client_llvm_version[0]) != (11, 14):
-        c_llvm = '.'.join(map(str, client_llvm_version))
-        s_llvm = '.'.join(map(str, server_llvm_version))
-        msg = (f'Test requires server LLVM 14, got {s_llvm}. And client LLVM '
-               f'11, got {c_llvm}')
-        pytest.skip(msg)
-
-    if kind == 'udf':
-        @heavydb('int32(int32)')
-        def add(a):
-            return a + 1
-    else:
-        @heavydb('int32(TableFunctionManager, Column<int>, OutputColumn<int>)')
-        def column_copy(mgr, inp, out):
-            size = len(inp)
-            mgr.set_output_row_size(size)
-            for i in range(size):
-                out[i] = inp[i]
-            return size
-
-    with pytest.warns(LLVMVersionMismatchWarning):
-        heavydb.register()
diff --git a/rbc/warnings.py b/rbc/warnings.py
deleted file mode 100644
index f129a41e..00000000
--- a/rbc/warnings.py
+++ /dev/null
@@ -1,7 +0,0 @@
-
-class LLVMVersionMismatchWarning(UserWarning):
-    """
-    Raised when Numba and HeavyDB uses different LLVM version which is known to
-    be incompatible/problematic.
-    """
-    pass