Use 3.x-dev release of Gin. Remove patch that was merged upstream.

composer.json

@@ -27,7 +27,7 @@
         "drupal/entity_reference_validators": "^1.0@alpha",
         "drupal/fraction": "2.x-dev",
         "drupal/geofield": "^1.15",
-        "drupal/gin": "^3.0@alpha",
+        "drupal/gin": "3.x-dev",
         "drupal/inline_entity_form": "^1.0@RC",
         "drupal/jsonapi_extras": "^3.15",
         "drupal/jsonapi_schema": "^1.0@beta",
@@ -56,9 +56,6 @@
             "drupal/entity": {
                 "Issue #3190436: EntityViewsData Column information not available for computed entity reference fields": "https://www.drupal.org/files/issues/2020-12-30/3190436-2.patch"
             },
-            "drupal/gin": {
-                "Issue #3197363: Dispatch event when the toolbar is toggled": "https://git.drupalcode.org/project/gin/-/merge_requests/15.patch"
-            },
             "drupal/simple_oauth": {
                 "Issue #3173947: Cannot authorize non-confidential clients": "https://www.drupal.org/files/issues/2020-09-29/3173947-2.patch",
                 "Issue #3167287: Always load clients through the Client Repository service": "https://www.drupal.org/files/issues/2020-09-29/3167287-9.patch",