Simplify Linux build by using pip packages only

Author: PhialsBasement

.github/workflows/build.yml

@@ -68,9 +68,6 @@ jobs:
           python-version: '3.9'
       - name: Install dependencies
         run: |
-          sudo add-apt-repository ppa:neon/qt6
-          sudo apt-get update
-          sudo apt-get install -y qt6-base-dev qt6-declarative-dev libqt6sql6 libqt6core6 libqt6gui6 libqt6widgets6
           python -m pip install --upgrade pip
           pip install pyinstaller
           pip install -r requirements.txt