enhance: clean .github/workflow/main.yaml

Signed-off-by: Sammy Huang <[email protected]>

.github/workflows/main.yaml

@@ -41,19 +41,16 @@ concurrency:
 
 jobs:
   Build:
-    name: Build and test AMD64 Ubuntu ${{ matrix.ubuntu }}
-    runs-on: ubuntu-${{ matrix.ubuntu }}
+    name: Build and test AMD64 Ubuntu 20.04
+    runs-on: ubuntu-latest
     timeout-minutes: 180
     strategy:
       fail-fast: false
-      matrix:
-        ubuntu: [20.04]
     env:
-      UBUNTU: ${{ matrix.ubuntu }}
+      UBUNTU: 20.04
     steps:
       - name: Setup mold
         uses: rui314/setup-mold@v1
-
       - name: Maximize build space
         uses: easimon/maximize-build-space@master
         if: ${{ ! startsWith(runner.name, 'self') }} # skip this step if it is self-hosted runner
@@ -103,14 +100,12 @@ jobs:
   UT-Cpp:
     name: UT for Cpp
     needs: Build
-    runs-on: ubuntu-${{ matrix.ubuntu }}
+    runs-on: ubuntu-latest
     timeout-minutes: 60
     strategy:
       fail-fast: false
-      matrix:
-        ubuntu: [20.04]
     env:
-      UBUNTU: ${{ matrix.ubuntu }}
+      UBUNTU: 20.04
     steps:
       - name: Download code
         uses: actions/[email protected]
@@ -146,14 +141,12 @@ jobs:
   UT-Go:
     name: UT for Go
     needs: Build
-    runs-on: ubuntu-${{ matrix.ubuntu }}
+    runs-on: ubuntu-latest
     timeout-minutes: 60
     strategy:
       fail-fast: false
-      matrix:
-        ubuntu: [20.04]
     env:
-      UBUNTU: ${{ matrix.ubuntu }}
+      UBUNTU: 20.04
     steps:
       - name: Download code
         uses: actions/[email protected]
@@ -189,14 +182,12 @@ jobs:
   integration-test:
     name: Integration Test
     needs: Build
-    runs-on: ubuntu-${{ matrix.ubuntu }}
+    runs-on: ubuntu-latest
     timeout-minutes: 60
     strategy:
       fail-fast: false
-      matrix:
-        ubuntu: [20.04]
     env:
-      UBUNTU: ${{ matrix.ubuntu }}
+      UBUNTU: 20.04
     steps:
       - name: Download code
         uses: actions/[email protected]
@@ -248,7 +239,6 @@ jobs:
       - name: Display structure of code coverage results
         run: |
           ls -lah
-
       - name: Upload coverage to Codecov
         if: "github.repository == 'milvus-io/milvus'"
         uses: codecov/[email protected]
@@ -265,5 +255,5 @@ jobs:
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ./go_coverage.txt,./lcov_output.info,./it_coverage.txt
-          name: ubuntu-${{ matrix.ubuntu }}-unittests
+          name: ubuntu-20.04-unittests
           fail_ci_if_error: true