Remove old GitHub files

.github/FUNDING.yml

@@ -1 +0,0 @@
-ko_fi: redstrate

.github/workflows/arch.yml

@@ -1,31 +0,0 @@
-name: Arch Linux CI
-
-on: [push, pull_request, workflow_dispatch]
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    container: archlinux:latest
-
-    steps:
-      - name: Install dependencies
-        run: |
-          pacman -Syu --noconfirm base-devel qt5-tools qt5-base libsecret cmake git tesseract libxcomposite unshield pugixml
-
-      - uses: actions/checkout@v2
-        with:
-          submodules: 'recursive'
-
-      - name: Compile
-        run: |
-          mkdir build && cd build
-          cmake -DCMAKE_BUILD_TYPE=None -DBUILD_SHARED_LIBS=OFF ..
-          make
-          install -Dm 755 astra -t /tmp/astra
-
-      - name: Archive the artifacts
-        uses: actions/upload-artifact@v2
-        with:
-          name: Arch Linux Executable
-          path: /tmp/astra
-