Remove some legacy code for conda_raw

Note: At the time of writing, this renders the package unbuildable
because we have nothing between 6164 (legacy) and 6219 (broken).
But this will soon change when pypdfium2_raw is rebuilt against
pdfium-binaries 6281, which will happen before the next helpers release.

conda/helpers/recipe/meta.yaml

@@ -30,12 +30,12 @@ requirements:
     - setuptools
     - wheel !=0.38.0,!=0.38.1
   run:
-    # Set an upper boundary for pypdfium2_raw as defined in craft_packages.py
-    # NOTE There currently is no significant minimum pdfium requirement, but we could add one should the necessity arise.
-    # pdfium 6219: blacklisted due to https://crbug.com/pdfium/2112
-    # (6205 is also affected, but not on conda due to monthly schedule)
+    # -- Reasons for pdfium version bounds --
+    # >6164 : API-breaking changes to ctypesgen
+    # !=6219 : Blacklisted due to https://crbug.com/pdfium/2112 (6205 is also affected, but not on conda due to monthly schedule)
+    # <={{ pdfium_max }} : Prevents future versions for API safety reasons
     - python
-    - pypdfium2-team::pypdfium2_raw <={{ pdfium_max }},!=6219
+    - pypdfium2-team::pypdfium2_raw >6164,!=6219,<={{ pdfium_max }}
 
 test:
   requires:

src/pypdfium2/__main__.py

@@ -7,14 +7,8 @@
 from pypdfium2.version import PYPDFIUM_INFO, PDFIUM_INFO
 from pypdfium2._cli._parsers import setup_logging
 
-try:
-    from pypdfium2_raw.bindings import _libs_info
-    pdfium_path = _libs_info["pdfium"]["path"]
-except ImportError:
-    # retained for downward compatibility with conda pypdfium2_raw <= 6164 by date of initial build
-    # actually it's the ctypesgen version that matters, but we don't have info about that
-    from pypdfium2_raw.bindings import _loader_info
-    pdfium_path = _loader_info["libpath"]
+from pypdfium2_raw.bindings import _libs_info
+pdfium_path = _libs_info["pdfium"]["path"]
 
 SubCommands = {
     "arrange":        "rearrange/merge documents",