Don't create extension in GHA workflow

Author: browniebroke

.github/workflows/main.yml

@@ -70,9 +70,6 @@ jobs:
     - name: Install dependencies
       run: python -m pip install --upgrade tox
 
-    - name: Create unaccent extension
-      run: PGPASSWORD=postgres psql -h localhost -U postgres -d postgres -c 'CREATE EXTENSION IF NOT EXISTS unaccent;'
-
     - name: Run tox targets for ${{ matrix.python-version }}
       run: tox run -f py$(echo ${{ matrix.python-version }} | tr -d . | cut -f 1 -d '-')