Merge branch 'kassio/remove-import_redis_increment_by-flag' into 'master'

Remove import_redis_increment_by feature flag

See merge request gitlab-org/gitlab!79130

config/feature_flags/development/import_redis_increment_by.yml

----
-name: import_redis_increment_by
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/65773
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/336226
-milestone: '14.1'
-type: development
-group: group::import
-default_enabled: true

lib/gitlab/github_import/object_counter.rb

@@ -71,11 +71,7 @@ module Gitlab
 
           add_counter_to_list(project, operation, counter_key)
 
-          if Feature.disabled?(:import_redis_increment_by, default_enabled: :yaml)
-            CACHING.increment(counter_key)
-          else
-            CACHING.increment_by(counter_key, value)
-          end
+          CACHING.increment_by(counter_key, value)
         end
 
         def add_counter_to_list(project, operation, key)