Remove release/26.04 from nightly pipeline trigger (#112)

Author: AyodeAwe

.github/workflows/nightly-pipeline-trigger.yaml

@@ -13,8 +13,6 @@ jobs:
         include:
           - rapids_branch: "main"
             run_tests: true
-          - rapids_branch: "release/26.04"
-            run_tests: true
     steps:
       - uses: actions/checkout@v6
       - name: Trigger Pipeline