Remove all usage of ansible.module_utils.six from main branch (#10888)

* Get rid of all six.moves imports.

* Get rid of iteritems.

* Get rid of *_type(s) aliases.

* Replace StringIO import.

* Get rid of PY2/PY3 constants.

* Get rid of raise_from.

* Get rid of python_2_unicode_compatible.

* Clean up global six imports.

* Remove all usage of ansible.module_utils.six.

* Linting.

* Fix xml module.

* Docs adjustments.

plugins/modules/homebrew_cask.py

@@ -158,7 +158,6 @@ from ansible_collections.community.general.plugins.module_utils.homebrew import
 
 from ansible.module_utils.common.text.converters import to_bytes
 from ansible.module_utils.basic import AnsibleModule
-from ansible.module_utils.six import iteritems, string_types
 
 
 # exceptions -------------------------------------------------------------- {{{
@@ -201,7 +200,7 @@ class HomebrewCask(object):
             return True
 
         return (
-            isinstance(cask, string_types)
+            isinstance(cask, str)
             and not cls.INVALID_CASK_REGEX.search(cask)
         )
 
@@ -217,7 +216,7 @@ class HomebrewCask(object):
             return True
         else:
             return (
-                isinstance(state, string_types)
+                isinstance(state, str)
                 and state.lower() in (
                     'installed',
                     'absent',
@@ -261,7 +260,7 @@ class HomebrewCask(object):
             raise HomebrewCaskException(self.message)
 
         else:
-            if isinstance(path, string_types):
+            if isinstance(path, str):
                 self._path = path.split(':')
             else:
                 self._path = path
@@ -348,7 +347,7 @@ class HomebrewCask(object):
         self.message = ''
 
     def _setup_instance_vars(self, **kwargs):
-        for key, val in iteritems(kwargs):
+        for key, val in kwargs.items():
             setattr(self, key, val)
 
     def _prep(self):
@@ -488,7 +487,7 @@ class HomebrewCask(object):
             'update',
         ])
         if rc == 0:
-            if out and isinstance(out, string_types):
+            if out and isinstance(out, str):
                 already_updated = any(
                     re.search(r'Already up-to-date.', s.strip(), re.IGNORECASE)
                     for s in out.split('\n')