delete .github configuration folder

.github/FUNDING.yml

-github: inputmice
-liberapay: inputmice
-custom: https://gultsch.de/donate.html

.github/workflows/android.yml

-name: Android CI
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v2
-    - name: set up JDK 11
-      uses: actions/setup-java@v2
-      with:
-        java-version: '11'
-        distribution: 'adopt'
-    - name: Download WebRTC
-      run: mkdir libs && wget -O libs/libwebrtc-m99.aar https://gultsch.de/files/libwebrtc-m99.aar
-    - name: Grant execute permission for gradlew
-      run: chmod +x gradlew
-    - name: Build Quicksy
-      run: ./gradlew assembleQuicksyFreeDebug
-    - name: Build Conversations
-      run: ./gradlew assembleConversationsFreeDebug
-    - uses: actions/upload-artifact@v2
-      with:
-        name: Conversations all-flavors (debug)
-        path: ./build/outputs/apk/**/debug/Conversations-*.apk
-
-