cleanup: Refactor DLL loading and remove metadata from __init__.py

Simplified the DLL loading process for Windows platform by removing version-specific conditions. Also, removed unnecessary metadata such as status, author, email, license, and copyright from the file. All that stuff can be retrieved with importlib.metadata.

Signed-off-by: Zach Lewis <[email protected]>

src/python/__init__.py

@@ -21,39 +21,19 @@
     # Python wheel module is dynamically linked to the OIIO DLL present in the bin folder.
     _bin_dir = os.path.join(_here, "bin")
     if os.path.exists(_bin_dir):
-        if sys.version_info >= (3, 8):
-            os.add_dll_directory(_bin_dir)  
-        else:
-            os.environ['PATH'] = '{0};{1}'.format(_bin_dir, os.getenv('PATH', ''))
-
-    #TODO: Remove. Python 3.8 stopped loading DLLs from PATH on Windows for security reasons.
-    if sys.version_info >= (3, 8):
+        os.add_dll_directory(_bin_dir) 
+    elif sys.version_info >= (3, 8):
         # This works around the python 3.8 change to stop loading DLLs from PATH on Windows.
         # We reproduce the old behavior by manually tokenizing PATH, checking that the 
         # directories exist and are not ".", then add them to the DLL load path.
         # Set the environment variable "OIIO_LOAD_DLLS_FROM_PATH" to "0" to disable this behavior.
         if os.getenv("OIIO_LOAD_DLLS_FROM_PATH", "1") == "1":
-            logger.warning(
-                "Adding DLL directories to PATH. This behavior will be removed in "
-                "a future version. Set the environment variable OIIO_LOAD_DLLS_FROM_PATH "
-                "to 0 to disable this behavior."
-            )
             for path in os.getenv("PATH", "").split(os.pathsep):
                 if os.path.exists(path) and path != ".":
                     os.add_dll_directory(path)
 
 from .OpenImageIO import * # type: ignore # noqa: F401, F403, E402
 
-__status__ = "production"
-
-__author__ = "OpenImageIO Contributors"
-
-__email__ = "[email protected]"
-
-__license__ = "SPDX-License-Identifier: Apache-2.0"
-
-__copyright__ = "Copyright Contributors to the OpenImageIO Project"
-
 __doc__ = """
 OpenImageIO is a toolset for reading, writing, and manipulating image files of 
 any image file format relevant to VFX / animation via a format-agnostic API