ci: remove redundant skip-repomix condition

Author: bug3

.github/workflows/repomix.yml

@@ -11,7 +11,6 @@ permissions:
 jobs:
   pack:
     runs-on: ubuntu-latest
-    if: "!contains(github.event.head_commit.message, '[skip repomix]')"
     steps:
       - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
       - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4