Revert "Check registered application by id"

This reverts commit c60b278c.

ApplicationRegisterService.proto

@@ -26,9 +26,6 @@ import "KeyWithIntegerValue.proto";
 
 //register service for ApplicationCode, this service is called when service starts.
 service ApplicationRegisterService {
-    rpc registeredApplicationCheck (RegisteredApplication) returns (ApplicationCheckResult) {
-    }
-    
     rpc applicationCodeRegister (Application) returns (ApplicationMapping) {
     }
 }
@@ -40,11 +37,3 @@ message Application {
 message ApplicationMapping {
     KeyWithIntegerValue application = 1;
 }
-
-message RegisteredApplication {
-    int32 applicationId = 1;
-}
-
-message ApplicationCheckResult {
-    bool existed = 1;
-}