Merge pull request #3873 from mshabunin:cleanup-old-ci

Disable obsolete GHA pipelines for 3.4

Author: asmorkalov

Diff for: .github/workflows/PR-3.4.yaml

@@ -9,9 +9,6 @@ jobs:
   Ubuntu2004-ARM64:
     uses: opencv/ci-gha-workflow/.github/workflows/OCV-Contrib-PR-3.4-ARM64.yaml@main
 
-  Ubuntu1404-x64:
-    uses: opencv/ci-gha-workflow/.github/workflows/OCV-Contrib-PR-3.4-U14.yaml@main
-
   Ubuntu2004-x64:
     uses: opencv/ci-gha-workflow/.github/workflows/OCV-Contrib-PR-3.4-U20.yaml@main