chore: remove redundant preparation steps in deploy workflow

Author: demola234

.github/workflows/deploy_homebrew.yml

@@ -25,12 +25,6 @@ jobs:
         run: dart run grinder homebrew-formula --version=${{ github.ref_name }}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      
-
-      - name: Prepare directory for PR
-        run: |
-          mkdir -p formula
-          mv flutter_bunny.rb formula/
 
       - name: Checkout homebrew-tap repo
         uses: actions/checkout@v3