Disable Carthage tests, don't run tests twice

Author: jberkel

.github/workflows/build.yml

@@ -1,5 +1,11 @@
 name: Build and test
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
 concurrency:
   group: ci-${{ github.ref }}
   cancel-in-progress:  ${{ github.ref != 'refs/heads/master' }}
@@ -45,26 +51,6 @@ jobs:
       env:
         VALIDATOR_SUBSPEC: SQLCipher
       run: ./run-tests.sh
-    - name: "Run tests (CARTHAGE_PLATFORM: iOS)"
-      env:
-        CARTHAGE_PLATFORM: iOS
-      run: ./run-tests.sh
-    - name: "Run tests (CARTHAGE_PLATFORM: Mac)"
-      env:
-        CARTHAGE_PLATFORM: Mac
-      run: ./run-tests.sh
-    - name: "Run tests (CARTHAGE_PLATFORM: watchOS)"
-      env:
-        CARTHAGE_PLATFORM: watchOS
-      run: ./run-tests.sh
-    - name: "Run tests (CARTHAGE_PLATFORM: tvOS)"
-      env:
-        CARTHAGE_PLATFORM: tvOS
-      run: ./run-tests.sh
-    - name: "Run tests (CARTHAGE_PLATFORM: visionOS)"
-      env:
-        CARTHAGE_PLATFORM: visionOS
-      run: ./run-tests.sh
   build-linux:
     runs-on: ubuntu-latest
     steps: