Add support for customizing the catalog graph relations using an API

Signed-off-by: Gustaf Räntilä <g.rantila@gmail.com>

packages/app/src/App.tsx

@@ -14,18 +14,6 @@
  * limitations under the License.
  */
 
-import {
-  RELATION_API_CONSUMED_BY,
-  RELATION_API_PROVIDED_BY,
-  RELATION_CONSUMES_API,
-  RELATION_DEPENDENCY_OF,
-  RELATION_DEPENDS_ON,
-  RELATION_HAS_PART,
-  RELATION_OWNED_BY,
-  RELATION_OWNER_OF,
-  RELATION_PART_OF,
-  RELATION_PROVIDES_API,
-} from '@backstage/catalog-model';
 import { createApp } from '@backstage/app-defaults';
 import { AppRouter, FeatureFlagged, FlatRoutes } from '@backstage/core-app-api';
 import {
@@ -158,18 +146,6 @@ const routes = (
         <CatalogGraphPage
           initialState={{
             selectedKinds: ['component', 'domain', 'system', 'api', 'group'],
-            selectedRelations: [
-              RELATION_OWNER_OF,
-              RELATION_OWNED_BY,
-              RELATION_CONSUMES_API,
-              RELATION_API_CONSUMED_BY,
-              RELATION_PROVIDES_API,
-              RELATION_API_PROVIDED_BY,
-              RELATION_HAS_PART,
-              RELATION_PART_OF,
-              RELATION_DEPENDS_ON,
-              RELATION_DEPENDENCY_OF,
-            ],
           }}
         />
       }