Remove mariadb test (uses the same backend as mysql!)

.github/workflows/mariadb.yaml

@@ -1,48 +0,0 @@
-name: MariaDB
-
-on: ["push", "pull_request"]
-
-jobs:
-
-  test:
-    runs-on: ubuntu-latest
-
-    env:
-      # Database backend configuration
-      INVENTREE_DB_ENGINE: django.db.backends.mysql
-      INVENTREE_DB_NAME: inventree
-      INVENTREE_DB_USER: root
-      INVENTREE_DB_PASSWORD: password
-      INVENTREE_DB_HOST: '127.0.0.1'
-      INVENTREE_DB_PORT: 3306
-      INVENTREE_DEBUG: info
-      INVENTREE_MEDIA_ROOT: ./media
-      INVENTREE_STATIC_ROOT: ./static
-
-    services:
-      mariadb:
-        image: mariadb:latest
-        env:
-          MYSQL_ALLOW_EMPTY_PASSWORD: yes
-          MYSQL_DATABASE: inventree
-          MYSQL_USER: inventree
-          MYSQL_PASSWORD: password
-          MYSQL_ROOT_PASSWORD: password
-        ports:
-          - 3306:3306
-
-    steps:
-      - name: Checkout Code
-        uses: actions/checkout@v2
-      - name: Setup Python
-        uses: actions/setup-python@v2
-        with:
-          python-version: 3.7
-      - name: Install Dependencies
-        run: |
-          sudo apt-get install mysql-server libmysqlclient-dev
-          pip3 install invoke
-          pip3 install mysqlclient
-          invoke install
-      - name: Run Tests
-        run: invoke test