test(nextjs): Drop nextjs-16-cf-workers canary variant (#23540)

Removes the `nextjs-16-cf-workers (canary)` E2E variant while the
upstream fix is pending.


Refs #23541 for restoring the variant.

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: 2 people

dev-packages/e2e-tests/test-applications/nextjs-16-cf-workers/package.json

@@ -45,12 +45,6 @@
         "build-command": "pnpm test:build-latest",
         "label": "nextjs-16-cf-workers (latest)"
       }
-    ],
-    "optionalVariants": [
-      {
-        "build-command": "pnpm test:build-canary",
-        "label": "nextjs-16-cf-workers (canary)"
-      }
     ]
   }
 }