Don't clone QApng in the CI

.github/workflows/build.yml

@@ -60,18 +60,6 @@ jobs:
           -DCMAKE_BUILD_TYPE=Release
           -S ${{ github.workspace }}
 
-      - name: Clone QtApng
-        uses: actions/checkout@master
-        with:
-          repository: jurplel/QtApng
-          path: "QtApng"
-
-      - name: Build and deploy QtApng
-        run: |
-          cd QtApng
-          cmake --build ${{ steps.strings.outputs.build-output-dir }} --config Release
-          nmake
-
       - name: Install Windows Discord RPC
         shell: bash
         run: |
@@ -131,21 +119,6 @@ jobs:
           sudo apt-get upgrade
           sudo apt-get install qtbase5-dev libqt5websockets5-dev qttools5-dev qt5-image-formats-plugins
 
-      - name: Clone QtApng
-        uses: actions/checkout@master
-        with:
-          repository: Skycoder42/QtApng
-          path: "QtApng"
-
-      - name: Build and deploy QtApng
-        run: |
-          cd QtApng/src/3rdparty
-          chmod +x get_libs.sh
-          ./get_libs.sh 1.3.1 1.6.40
-          cd ../..
-          qmake CONFIG+=install_ok QMAKE_CXXFLAGS+="-fno-sized-deallocation"
-          make
-
       - name: Install Linux Discord RPC
         run: |
           curl -L https://github.com/discordapp/discord-rpc/releases/download/v3.4.0/discord-rpc-linux.zip -o discord_rpc.zip