[llvm] [Github][CI] Remove premerge container (PR #123483)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-github-workflow

Author: Aiden Grossman (boomanaiden154)

<details>
<summary>Changes</summary>

This patch removes the container from the premerge job. We are moving away from the kubernetes executor back to executing everything in the same container due to reliability issues. This patch updates everything in the premerge job to work.

---
Full diff: https://github.com/llvm/llvm-project/pull/123483.diff


1 Files Affected:

- (modified) .github/workflows/premerge.yaml (-5) 


``````````diff
diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index 261dc8bbb97e0a..ddef6206bcae89 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -18,11 +18,6 @@ jobs:
     concurrency:
       group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
       cancel-in-progress: true
-    container:
-      image: ghcr.io/llvm/ci-ubuntu-22.04:latest
-    defaults:
-      run:
-        shell: bash
     steps:
       - name: Checkout LLVM
         uses: actions/checkout at v4

``````````

</details>


https://github.com/llvm/llvm-project/pull/123483