Followup (#7)

* Changes remove the API version concept from GetDisk and InsertDisk, now just defaults to using the Beta API.

* Cleaning up un-used variables.

* pkg/gce-cloud-provider/compute/fake-gce.go

Author: sjswerdlow

pkg/common/utils_test.go

@@ -1409,7 +1409,7 @@ func TestIsUserMultiAttachError(t *testing.T) {
 		},
 	}
 	for _, test := range cases {
-		code, err := isUserMultiAttachError(fmt.Errorf(test.errorString))
+		code, err := isUserMultiAttachError(fmt.Errorf("%s", test.errorString))
 		if test.expectCode {
 			if err != nil || code != test.expectedCode {
 				t.Errorf("Failed with non-nil error %v or bad code %v: %s", err, code, test.errorString)

pkg/gce-pd-csi-driver/controller_test.go

@@ -1741,7 +1741,7 @@ func TestMultiZoneVolumeCreationErrHandling(t *testing.T) {
 		}
 
 		for _, volKey := range tc.wantDisks {
-			disk, err := fcp.GetDisk(context.Background(), project, volKey, gce.GCEAPIVersionV1)
+			disk, err := fcp.GetDisk(context.Background(), project, volKey)
 			if err != nil {
 				t.Errorf("Unexpected err fetching disk %v: %v", volKey, err)
 			}