remove: delete register methods

proto/identity.proto

@@ -9,7 +9,6 @@ service AuthService {
     rpc Refresh (RefreshRequest) returns (RefreshResponse);
     rpc Logout (LogoutRequest) returns (LogoutResponse);
     rpc UnlockPin (UnlockPinRequest) returns (UnlockPinResponse);
-    rpc Register (RegisterRequest) returns (RegisterResponse);
     rpc Verify2Fa (Verify2FaRequest) returns (Verify2FaResponse);
 }
 
@@ -68,16 +67,6 @@ message UnlockPinResponse {
   string message = 2;
 }
 
-message RegisterRequest {
-  string username = 1;
-  string password = 2;
-}
-
-message RegisterResponse {
-  string user_id = 1;
-  string status = 2;
-  string message = 3;
-}
 
 message Verify2FaRequest {
     string temp_token = 1;