removing documentation fragment

Signed-off-by: Modular Magician <magic-modules@google.com>

plugins/modules/gcp_compute_instance_group.py

@@ -36,7 +36,7 @@ description:
   template. Unlike managed instance groups, you must create and add instances to an
   instance group manually.
 short_description: Creates a GCP InstanceGroup
-version_added: 2.6
+version_added: '2.6'
 author: Google Inc. (@googlecloudplatform)
 requirements:
 - python >= 2.6
@@ -124,8 +124,44 @@ options:
     - Only the full identifier of the instance will be returned.
     required: false
     type: list
-    version_added: 2.8
-extends_documentation_fragment: gcp
+    version_added: '2.8'
+  project:
+    description:
+    - The Google Cloud Platform project to use.
+    type: str
+  auth_kind:
+    description:
+    - The type of credential used.
+    type: str
+    required: true
+    choices:
+    - application
+    - machineaccount
+    - serviceaccount
+  service_account_contents:
+    description:
+    - The contents of a Service Account JSON file, either in a dictionary or as a
+      JSON string that represents it.
+    type: jsonarg
+  service_account_file:
+    description:
+    - The path of a Service Account JSON file if serviceaccount is selected as type.
+    type: path
+  service_account_email:
+    description:
+    - An optional service account email address if machineaccount is selected and
+      the user does not wish to use the default email.
+    type: str
+  scopes:
+    description:
+    - Array of scopes to be used
+    type: list
+  env_type:
+    description:
+    - Specifies which Ansible environment you're running this module within.
+    - This should not be set unless you know what you're doing.
+    - This only alters the User Agent string for any API requests.
+    type: str
 '''
 
 EXAMPLES = '''