Remove GitLab specific code

lib/elasticsearch/git/repository.rb

@@ -437,29 +437,9 @@ module Elasticsearch
             }
           end
-          if options[:project_ids]
-            conditions = [{ terms: { id: options[:project_ids] }}]
-
-            if options[:public_and_internal_projects]
-              conditions << {
-                term: { visibility_level: Project::PUBLIC }
-              }
-
-              conditions << {
-                term: { visibility_level: Project::INTERNAL }
-              }
-            end
-
-            query_hash[:query][:bool][:filter] == {
-              has_parent: {
-                parent_type: 'project',
-                query: {
-                  bool: {
-                    should: conditions
-                  }
-                }
-              }
-            }
+          if options[:additional_filter]
+            query_hash[:query][:bool][:filter] ||= []
+            query_hash[:query][:bool][:filter] << options[:additional_filter]
           end
           if options[:highlight]
@@ -524,29 +504,9 @@ module Elasticsearch
             }
           end
-          if options[:project_ids]
-            conditions = [{ terms: { id: options[:project_ids] }}]
-
-            if options[:public_and_internal_projects]
-              conditions << {
-                term: { visibility_level: Project::PUBLIC }
-              }
-
-              conditions << {
-                term: { visibility_level: Project::INTERNAL }
-              }
-            end
-
-            query_hash[:query][:bool][:filter] << {
-              has_parent: {
-                parent_type: 'project',
-                query: {
-                  bool: {
-                    should: conditions
-                  }
-                }
-              }
-            }
+          if options[:additional_filter]
+            query_hash[:query][:bool][:filter] ||= []
+            query_hash[:query][:bool][:filter] << options[:additional_filter]
           end
           if options[:language]