A couple more places where compat.six was used converted to module_utils.six (#22976)

CODING_GUIDELINES.md

@@ -277,7 +277,7 @@ To test if something is a string, consider that it may be unicode.
     if type(x) == str:
 
     # yes
-    from ansible.compat.six import string_types
+    from ansible.module_utils.six import string_types
     if isinstance(x, string_types):
 
 Cleverness

docs/api/Makefile

@@ -14,7 +14,7 @@ PAPER         =
 BUILDDIR      = _build
 RSTDIR        = rst
 MODULES_PATH  = ../../lib
-EXCLUDE_PATHS = ../../lib/ansible/modules ../../lib/ansible/utils/module_docs_fragments ../../lib/ansible/compat/six ../../lib/ansible/module_utils/six.py
+EXCLUDE_PATHS = ../../lib/ansible/modules ../../lib/ansible/utils/module_docs_fragments ../../lib/ansible/module_utils/six
 DOC_PROJECTS  = "Ansible API"
 
 # User-friendly check for sphinx-build