Revert "fixup! wip: ci: use fedoraBuild"

This reverts commit bfd826276d.

ci/Jenkinsfile

@@ -40,7 +40,7 @@ try {
         }
 
         stage('Sign') {
-            if (BRANCH_NAME == 'main') {
+            when(BRANCH_NAME == 'main') {
                 withEnvironment([
                     "GNUPGHOME=${env.WORKSPACE_TMP}/gnupg",
                 ]) {
@@ -57,14 +57,6 @@ try {
                         sh '. ci/sign.sh'
                     }
                 }
-            } else {
-                catchError(
-                    catchInterruptions: false, 
-                    buildResult: null,
-                    stageResult: 'NOT_BUILT',
-                ) {
-                    error('skip')
-                }
             }
         }