remove rollback capability from mock

In the mock, we have both Rollback and StorePvtDataOfInvalidTx
capabilities. As the Rollback capability was renamed to
StorePvtDataOfInvalidTx in production code, we need to remove
the Rollback capability from the mock.

FAB-15887 #done

Change-Id: If5c1d43310b1011bc0ae70fb6febe4d704d04977
Signed-off-by: senthil <cendhu@gmail.com>
(cherry picked from commit 59feca2)

Author: cendhu

common/mocks/config/application.go

@@ -48,7 +48,6 @@ type MockApplicationCapabilities struct {
 	V1_3ValidationRv             bool
 	V2_0ValidationRv             bool
 	FabTokenRv                   bool
-	RollbackRv                   bool
 	StorePvtDataOfInvalidTxRv    bool
 }
 
@@ -104,10 +103,6 @@ func (mac *MockApplicationCapabilities) FabToken() bool {
 	return mac.FabTokenRv
 }
 
-func (mac *MockApplicationCapabilities) Rollback() bool {
-	return mac.RollbackRv
-}
-
 func (mac *MockApplicationCapabilities) StorePvtDataOfInvalidTx() bool {
 	return mac.StorePvtDataOfInvalidTxRv
 }