remove docker dependabot updates (#149)

*Description of changes:*
Dependabot is not required for us to verify dockerfile updates

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Author: ahsan-z-khan

.github/dependabot.yml

@@ -1,12 +1,5 @@
 version: 2
 updates:
-  - package-ecosystem: "docker"
-    directory: "/"
-    schedule:
-      interval: "daily"
-    ignore:
-      - dependency-name: "docker/common/nxdt_requirements.txt"
-
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule: