chore: bye bye dependabot :) (#5409)

.github/dependabot.yml

@@ -1,37 +0,0 @@
-version: 2
-updates:
-  - package-ecosystem: npm
-    directory: /
-    schedule:
-      interval: weekly
-      day: sunday
-      time: "01:00"
-    reviewers:
-      - lipis
-    assignees:
-      - lipis
-    open-pull-requests-limit: 20
-
-  - package-ecosystem: npm
-    directory: /src/packages/excalidraw/
-    schedule:
-      interval: weekly
-      day: sunday
-      time: "01:00"
-    reviewers:
-      - ad1992
-    assignees:
-      - ad1992
-    open-pull-requests-limit: 20
-
-  - package-ecosystem: npm
-    directory: /src/packages/utils/
-    schedule:
-      interval: weekly
-      day: sunday
-      time: "01:00"
-    reviewers:
-      - ad1992
-    assignees:
-      - ad1992
-    open-pull-requests-limit: 20