remove host shard

Author: habdelra

.github/workflows/ci.yaml

@@ -146,13 +146,8 @@ jobs:
     name: Host Tests
     runs-on: ubuntu-latest
     concurrency:
-      group: boxel-host-test${{matrix.shardIndex}}/${{ github.head_ref || github.run_id }}
+      group: boxel-host-test${{ github.head_ref || github.run_id }}
       cancel-in-progress: true
-    strategy:
-      fail-fast: false
-      matrix:
-        shardIndex: [1, 2, 3]
-        shardTotal: [3]
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/init