diff --git a/frontend/src/app/components/wp-activity/activity-link-directive.ts b/frontend/src/app/components/wp-activity/activity-link-directive.ts
index 43753dbb01..8999213f8b 100644
--- a/frontend/src/app/components/wp-activity/activity-link-directive.ts
+++ b/frontend/src/app/components/wp-activity/activity-link-directive.ts
@@ -13,7 +13,7 @@ function activityLink() {
       onBlur: '&',
       onFocus: '&'
     },
-    link: function(scope) {
+    link: function(scope:any) {
       scope.workPackageId = scope.workPackage.id;
       scope.activityHtmlId = 'activity-' + scope.activityNo;
     }
diff --git a/frontend/src/app/ng1-overwritten-injections.ts b/frontend/src/app/ng1-overwritten-injections.ts
index ce43474f49..29b81f3dea 100644
--- a/frontend/src/app/ng1-overwritten-injections.ts
+++ b/frontend/src/app/ng1-overwritten-injections.ts
@@ -4,7 +4,6 @@ import {WorkPackageCacheService} from 'core-components/work-packages/work-packag
 import {WorkPackageDisplayFieldService} from 'core-components/wp-display/wp-display-field/wp-display-field.service';
 import {WorkPackageEditFieldService} from 'core-components/wp-edit/wp-edit-field/wp-edit-field.service';
 import {WorkPackageTableRefreshService} from 'core-components/wp-table/wp-table-refresh-request.service';
-import {ConfigurationService} from 'core-components/common/config/configuration.service';
 import {ExternalQueryConfigurationService} from "core-components/wp-table/external-configuration/external-query-configuration.service";
 
 class Ng1WorkPackageCacheService extends WorkPackageCacheService {
@@ -21,17 +20,10 @@ class Ng1WorkPackageDisplayFieldService extends WorkPackageDisplayFieldService {
 
 class Ng1WorkPackageEditFieldService extends WorkPackageEditFieldService {
 }
-class Ng1WorkPackageCacheService extends WorkPackageCacheService {}
 
-class Ng1SchemaCacheService extends SchemaCacheService {}
-
-class Ng1WorkPackageTableRefreshService extends WorkPackageTableRefreshService {}
-
-class Ng1WorkPackageDisplayFieldService extends WorkPackageDisplayFieldService {}
-
-class Ng1ExternalQueryConfigurationService extends ExternalQueryConfigurationService {}
+class Ng1ExternalQueryConfigurationService extends ExternalQueryConfigurationService {
+}
 
-class Ng1WorkPackageEditFieldService extends WorkPackageEditFieldService {}
 
 angular
   .module('openproject')