Update macos-build.yml

.github/workflows/macos-build.yml

@@ -1,22 +1,13 @@
-name: macOS toolchain CI
+name: macOS build
 
 on:
   push:
-    branches:
-      - main
-  pull_request:
+    branches: [ main ]
 
 jobs:
-  macos-build-and-test-toolchain:
-
+  build:
     runs-on: macOS-latest
 
-    steps:
-    - uses: actions/checkout@v2
-    - name: Fetch submodules
-      run: git submodule update --init --recursive
-
-
     steps:
       - uses: actions/checkout@v2
       - name: Fetch submodules