integration: update the gitlab config mandatory fields to match reality

packages/backend-common/src/reading/GitlabUrlReader.test.ts

@@ -36,6 +36,7 @@ const gitlabProcessor = new GitlabUrlReader(
   {
     host: 'gitlab.com',
     apiBaseUrl: 'https://gitlab.com/api/v4',
+    baseUrl: 'https://gitlab.com',
   },
   { treeResponseFactory },
 );
@@ -44,6 +45,7 @@ const hostedGitlabProcessor = new GitlabUrlReader(
   {
     host: 'gitlab.mycompany.com',
     apiBaseUrl: 'https://gitlab.mycompany.com/api/v4',
+    baseUrl: 'https://gitlab.mycompany.com',
   },
   { treeResponseFactory },
 );
@@ -379,17 +381,5 @@ describe('GitlabUrlReader', () => {
       };
       await expect(fnGithub).rejects.toThrow(NotFoundError);
     });
-
-    it('should throw error when apiBaseUrl is missing', () => {
-      expect(() => {
-        /* eslint-disable no-new */
-        new GitlabUrlReader(
-          {
-            host: 'gitlab.mycompany.com',
-          },
-          { treeResponseFactory },
-        );
-      }).toThrowError('must configure an explicit apiBaseUrl');
-    });
   });
 });

packages/backend-common/src/reading/GitlabUrlReader.ts

@@ -51,12 +51,6 @@ export class GitlabUrlReader implements UrlReader {
     deps: { treeResponseFactory: ReadTreeResponseFactory },
   ) {
     this.treeResponseFactory = deps.treeResponseFactory;
-
-    if (!config.apiBaseUrl) {
-      throw new Error(
-        `GitLab integration for '${config.host}' must configure an explicit apiBaseUrl`,
-      );
-    }
   }
 
   async read(url: string): Promise<Buffer> {