refactor(dependabot): remove dependency check for workspace definition

Author: Akinator31

.github/dependabot.yml

@@ -1,24 +1,5 @@
 version: 2
 updates:
-  # Enable version updates for Cargo (Rust) - Workspace
-  - package-ecosystem: "cargo"
-    directory: "/"
-    schedule:
-      interval: "weekly"
-      day: "monday"
-      time: "09:00"
-    open-pull-requests-limit: 50
-    reviewers:
-      - "@Akinator31"
-    assignees:
-      - "@Akinator31"
-    labels:
-      - "dependencies"
-      - "rust"
-    commit-message:
-      prefix: "cargo"
-      include: "scope"
-
   # Enable version updates for rustmail crate
   - package-ecosystem: "cargo"
     directory: "/rustmail"