Python code modernization, 1/n (#1141)

* Remove unicode text prefixes.

* Replace str.format() uses with f-strings.

* Replace % with f-strings, and do some cleanup.

* Fix wrong variable.

* Avoid unnecessary string conversion.

plugins/modules/docker_image_remove.py

@@ -99,8 +99,6 @@ untagged:
 
 import traceback
 
-from ansible.module_utils.common.text.converters import to_native
-
 from ansible_collections.community.docker.plugins.module_utils.common_api import (
     AnsibleDockerClient,
     RequestException,
@@ -134,7 +132,7 @@ class ImageRemover(DockerBaseClass):
         self.prune = parameters['prune']
 
         if not is_valid_tag(self.tag, allow_empty=True):
-            self.fail('"{0}" is not a valid docker tag'.format(self.tag))
+            self.fail(f'"{self.tag}" is not a valid docker tag')
 
         # If name contains a tag, it takes precedence over tag parameter.
         if not is_image_name_id(self.name):
@@ -171,7 +169,7 @@ class ImageRemover(DockerBaseClass):
         else:
             image = self.client.find_image(name, self.tag)
             if self.tag:
-                name = "%s:%s" % (self.name, self.tag)
+                name = f"{self.name}:{self.tag}"
 
         if self.diff:
             results['diff'] = dict(before=self.get_diff_state(image))
@@ -182,7 +180,7 @@ class ImageRemover(DockerBaseClass):
             return results
 
         results['changed'] = True
-        results['actions'].append("Removed image %s" % (name))
+        results['actions'].append(f"Removed image {name}")
         results['image'] = image
 
         if not self.check_mode:
@@ -192,7 +190,7 @@ class ImageRemover(DockerBaseClass):
                 # If the image vanished while we were trying to remove it, do not fail
                 res = []
             except Exception as exc:
-                self.fail("Error removing image %s - %s" % (name, to_native(exc)))
+                self.fail(f"Error removing image {name} - {exc}")
 
             for entry in res:
                 if entry.get('Untagged'):
@@ -257,10 +255,10 @@ def main():
         results = ImageRemover(client).absent()
         client.module.exit_json(**results)
     except DockerException as e:
-        client.fail('An unexpected Docker error occurred: {0}'.format(to_native(e)), exception=traceback.format_exc())
+        client.fail(f'An unexpected Docker error occurred: {e}', exception=traceback.format_exc())
     except RequestException as e:
         client.fail(
-            'An unexpected requests error occurred when trying to talk to the Docker daemon: {0}'.format(to_native(e)),
+            f'An unexpected requests error occurred when trying to talk to the Docker daemon: {e}',
             exception=traceback.format_exc())