Fix #136938: bpy.path.module_names does not return list[str]

The documentation at
https://docs.blender.org/api/4.4/bpy.path.html#bpy.path.module_names
points out that `bpy.path.module_names` returns `list[str]`, while it
actually returns `list[tuple[str, str]]`.

Besides fixing the documentation, this commit also removes a leftover
debug print.

Pull Request: https://projects.blender.org/blender/blender/pulls/136951

scripts/modules/bpy/path.py

@@ -366,7 +366,7 @@ def module_names(path, *, recursive=False, package=""):
     :arg package: Optional string, used as the prefix for module names (without the trailing ".").
     :type package: str
     :return: a list of string pairs (module_name, module_file).
-    :rtype: list[str]
+    :rtype: list[tuple[str, str]]
     """
 
     from os.path import join, isfile
@@ -451,7 +451,6 @@ def reduce_dirs(dirs):
     dirs.sort(key=lambda d: len(d))
     for i in range(len(dirs) - 1, -1, -1):
         for j in range(i):
-            print(i, j)
             if len(dirs[i]) == len(dirs[j]):
                 break
             elif is_subdir(dirs[i], dirs[j]):