[pkg] remove duplicate config from the analysis options files

Change-Id: I149a97bbe260600a3de664b28c4d212dd9adb889
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/335862
Reviewed-by: Nicholas Shahan <nshahan@google.com>
Reviewed-by: Phil Quitslund <pquitslund@google.com>
Commit-Queue: Devon Carew <devoncarew@google.com>

pkg/vm_snapshot_analysis/analysis_options.yaml

@@ -6,7 +6,5 @@ analyzer:
 
 linter:
   rules:
-    # Enable additional rules.
-    depend_on_referenced_packages: true
-    directives_ordering: true
-    sort_pub_dependencies: true
+    - directives_ordering
+    - sort_pub_dependencies