remove typechecks

.github/workflows/downstream_tests.yml

@@ -55,7 +55,7 @@ jobs:
       matrix:
         python-version: ["3.12"]
         os: [ubuntu-latest]
-        dependencies: ["core", "core,optional"]
+        dependencies: ["core,optional"]
 
     runs-on: ${{ matrix.os }}
     steps:
@@ -111,14 +111,6 @@ jobs:
             hatch run python -c "import narwhals; print(narwhals.__file__)"
             hatch run test-optional:test-narwhals
         timeout-minutes: 15
-      - name: Run typechecks
-        run: |
-            cd marimo
-            . .venv/bin/activate
-            # make sure that we use the .venv when running tests, so that
-            # the local narwhals install is picked up
-            sed -i '/^\[tool.hatch.envs.typecheck\]/a path = ".venv"' pyproject.toml
-            hatch run typecheck:check
 
   scikit-lego:
     strategy: