fix(vendir): remove registryUrls from git-refs dependencies (renovatebot#40938)

* fix(vendir): remove registryUrls from git-refs dependencies

The git-refs datasource does not support custom registries
(customRegistrySupport = false). Setting registryUrls on git
dependencies causes a spurious warning in the Renovate dashboard:
'Custom registries are not allowed for this datasource.'

This removes the registryUrls property from extractGitSource since
the git URL is already captured in depName and packageName.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* fix(vendir): remove redundant packageName from git-refs dependencies

Co-Authored-By: Claude <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: StuporHero

lib/modules/manager/vendir/extract.spec.ts

@@ -75,7 +75,7 @@ describe('modules/manager/vendir/extract', () => {
           {
             currentValue: '7.10.1',
             depName: 'https://github.com/test/test',
-            packageName: 'https://github.com/test/test',
+            depType: 'GitSource',
             datasource: 'git-refs',
           },
           {
@@ -86,6 +86,8 @@ describe('modules/manager/vendir/extract', () => {
           },
         ],
       });
+      // git-refs datasource does not support custom registries
+      expect(result?.deps[4].registryUrls).toBeUndefined();
     });
   });
 });

lib/modules/manager/vendir/extract.ts

@@ -53,10 +53,8 @@ export function extractGitSource(
   const httpUrl = getHttpUrl(gitSource.url);
   return {
     depName: httpUrl,
-    packageName: httpUrl,
     depType: 'GitSource',
     currentValue: gitSource.ref,
-    registryUrls: [httpUrl],
     datasource: GitRefsDatasource.id,
   };
 }