Remove welcome workflow

.github/workflows/welcome.yml

@@ -1,18 +0,0 @@
-name: 'Welcome New Contributors'
-
-on:
-  issues:
-    types: [opened]
-  pull_request_target:
-    types: [opened]
-
-jobs:
-  welcome-new-contributor:
-    runs-on: ubuntu-latest
-    steps:
-      - name: 'Greet the contributor'
-        uses: garg3133/welcome-new-contributors@v1.2
-        with:
-          token: ${{ secrets.BOT_ACCESS_TOKEN }}
-          issue-message: 'Hello there, on behalf the Flutter Quill Team I would like to thank you for opening your first issue. Your inputs and insights are valuable in shaping a stable and reliable version for all our users. Thank you for being part of the open-source community!'
-          pr-message: 'Hi there, thanks for opening your first Pull Request to this project!!'