chore: drop label comments across scripts

CommentsSayWhy read three scripts while 22 comments in 13 other files
named the next statement. They are removed or replaced by the reason,
and the test reads every tracked script and install.py.

scripts/cross_reference.py

@@ -706,7 +706,6 @@ def _cross_reference_profile(
 
         seen_files.add(seen_key)
 
-        # Group archived files by archive name
         if archive:
             archive_key = (
                 archive,
@@ -771,7 +770,6 @@ def _cross_reference_profile(
         }
         gaps.append(entry)
 
-    # Append grouped archive gaps
     for ag in sorted(archive_gaps.values(), key=lambda e: e["name"]):
         gaps.append(ag)