gh-103326: Remove Python/importlib.h (GH-103331)

Co-authored-by: Brett Cannon <brett@python.org>
Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>

Author: 3 people

.github/CODEOWNERS

@@ -61,11 +61,7 @@ Python/traceback.c            @iritkatriel
 /Tools/build/parse_html5_entities.py   @ezio-melotti
 
 # Import (including importlib).
-# Ignoring importlib.h so as to not get flagged on
-# all pull requests that change the emitted
-# bytecode.
-**/*import*.c                 @brettcannon @encukou @ericsnowcurrently @ncoghlan @warsaw
-**/*import*.py                @brettcannon @encukou @ericsnowcurrently @ncoghlan @warsaw
+**/*import*                   @brettcannon @encukou @ericsnowcurrently @ncoghlan @warsaw
 **/*importlib/resources/*      @jaraco @warsaw @FFY00
 **/importlib/metadata/*       @jaraco @warsaw
 

Programs/_freeze_module.c

@@ -1,6 +1,5 @@
 /* This is built as a stand-alone executable by the Makefile, and helps turn
-   modules into frozen modules (like Lib/importlib/_bootstrap.py
-   into Python/importlib.h).
+   modules into frozen modules.
 
    This is used directly by Tools/build/freeze_modules.py, and indirectly by "make regen-frozen".