Remove Github workflow

.github/workflows/build.yml

@@ -1,30 +0,0 @@
-name: Build randopix
-# This workflow is triggered on pushes to the repository.
-on:
-  push:
-    branches:
-      - master
-
-jobs:
-  build:
-    name: Build x86
-    # This job runs on Linux
-    runs-on: ubuntu-latest
-    steps:
-    - name: Install GTK packages
-      run: sudo apt install --ignore-missing gnome-devel
-    - uses: actions/checkout@master
-    - name: Cache choosenim
-      id: cache-choosenim
-      uses: actions/cache@v1
-      with:
-        path: ~/.choosenim
-        key: ${{ runner.os }}-choosenim-stable
-    - name: Cache nimble
-      id: cache-nimble
-      uses: actions/cache@v1
-      with:
-        path: ~/.nimble
-        key: ${{ runner.os }}-nimble-stable
-    - uses: jiro4989/setup-nim-action@v1.0.2
-    - run: nimble build -Y