remove dead cap refs (#21722)

Author: ettec

plugins/plugins.testing.yaml

@@ -9,14 +9,5 @@ defaults:
   goflags: "-ldflags=-s"
 
 plugins:
-  mock:
-    - enabled: true
-      moduleURI: "github.com/smartcontractkit/capabilities/mock"
-      gitRef: "02cb745cabad2979034e6f96ebb47c9322df24ba"
-      installPath: "."
-  capabilitywatcher:
-    - enabled: true
-      moduleURI: "github.com/smartcontractkit/capabilities/capabilitywatcher"
-      gitRef: "3d44e5711b322b57854a17de92277cdb8f383609"
-      installPath: "."
+