Cleanup go module entries (#119)

Author: shyamradhakrishnan

go.mod

@@ -5,7 +5,6 @@ go 1.16
 require (
 	github.com/go-logr/logr v1.2.2
 	github.com/golang/mock v1.6.0
-	github.com/googleapis/gnostic v0.5.5 // indirect
 	github.com/onsi/ginkgo v1.16.5
 	github.com/onsi/gomega v1.18.1
 	github.com/oracle/oci-go-sdk/v63 v63.0.0