chore: remove dependabot configuration

.github/dependabot.yml

@@ -1,78 +0,0 @@
-version: 2
-updates:
-  - package-ecosystem: pip
-    directory: /
-    target-branch: dev
-    schedule:
-      interval: monthly
-      day: monday
-      time: "09:00"
-      timezone: Asia/Kolkata
-    open-pull-requests-limit: 5
-    labels:
-      - dependencies
-      - python
-    groups:
-      root-python-minor-patch:
-        update-types:
-          - minor
-          - patch
-
-  - package-ecosystem: pip
-    directory: /backend
-    target-branch: dev
-    schedule:
-      interval: monthly
-      day: monday
-      time: "09:15"
-      timezone: Asia/Kolkata
-    open-pull-requests-limit: 5
-    labels:
-      - dependencies
-      - python
-      - backend
-    groups:
-      backend-python-minor-patch:
-        update-types:
-          - minor
-          - patch
-
-  - package-ecosystem: npm
-    directory: /frontend
-    target-branch: dev
-    schedule:
-      interval: monthly
-      day: monday
-      time: "09:30"
-      timezone: Asia/Kolkata
-    open-pull-requests-limit: 5
-    labels:
-      - dependencies
-      - javascript
-      - frontend
-    groups:
-      frontend-npm-minor-patch:
-        update-types:
-          - minor
-          - patch
-    ignore:
-      - dependency-name: "eslint"
-        versions: [">= 10.0.0"]
-
-  - package-ecosystem: github-actions
-    directory: /
-    target-branch: dev
-    schedule:
-      interval: monthly
-      day: monday
-      time: "09:45"
-      timezone: Asia/Kolkata
-    open-pull-requests-limit: 5
-    labels:
-      - dependencies
-      - github-actions
-    groups:
-      github-actions-minor-patch:
-        update-types:
-          - minor
-          - patch