Revert "Check registered application by id"

This reverts commit c60b278cbdecb0f0f15ce8d4fb578d2ed2d85438.
diff --git a/ApplicationRegisterService.proto b/ApplicationRegisterService.proto
index 8c824e7..a3b8e3a 100644
--- a/ApplicationRegisterService.proto
+++ b/ApplicationRegisterService.proto
@@ -26,9 +26,6 @@
 
 //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 ApplicationMapping {
     KeyWithIntegerValue application = 1;
 }
-
-message RegisteredApplication {
-    int32 applicationId = 1;
-}
-
-message ApplicationCheckResult {
-    bool existed = 1;
-}