Revert "Add error info"

This reverts commit 5b0dc19

bdchain/api/common.proto

@@ -7,16 +7,8 @@ option java_package = "bdchain.api.grpc";
 option java_outer_classname = "CommonProto";
 option java_multiple_files = true;
 
-message Error {
-  string code = 1; // One of a server-defined set of error codes.
-  string message = 2; // A human-readable representation of the error.
-  string target = 3; // The target of the error.
-  repeated Error details = 4; // An array of details about specific errors that led to this reported error.
-}
-
 message ClientVersionResponse {
-  Error error = 1;
-  string version = 2; // 节点客户端版本
+  string version = 1; // 节点客户端版本
 }
 
 /* 事务类型 */