Stick to Android & iOS builds

- Android builds now use all platforms

.github/workflows/flutter.yml

@@ -7,19 +7,11 @@ on:
     branches: [develop, main, "feature/**", "patch/**"]
 
 jobs:
-  linux:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - uses: subosito/flutter-action@v2
-        with:
-          channel: "stable"
-      - run: flutter pub get
-      - run: flutter config --enable-linux-desktop
-      - run: flutter build linux
-
   android:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.platform }}
+    strategy:
+      matrix:
+        platform: [ubuntu-latest, windows-latest, macOS-latest]
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-java@v1
@@ -32,17 +24,6 @@ jobs:
       - run: flutter build apk
       - run: flutter build appbundle
 
-  macos:
-    runs-on: macos-latest
-    steps:
-      - uses: actions/checkout@v3
-      - uses: subosito/flutter-action@v2
-        with:
-          channel: "stable"
-      - run: flutter pub get
-      - run: flutter config --enable-macos-desktop
-      - run: flutter build macos --release
-
   ios:
     runs-on: macos-latest
     steps:
@@ -52,14 +33,3 @@ jobs:
           channel: "stable"
       - run: flutter pub get
       - run: flutter build ios --release --no-codesign
-
-  windows:
-    runs-on: windows-latest
-    steps:
-      - uses: actions/checkout@v3
-      - uses: subosito/flutter-action@v2
-        with:
-          channel: "stable"
-      - run: flutter pub get
-      - run: flutter config --enable-windows-desktop
-      - run: flutter build windows