refactor: remove unused grpc methods (#67)

proto/greptime/v1/meta/route.proto

@@ -21,8 +21,6 @@ option go_package = "github.com/GreptimeTeam/greptime-proto/go/greptime/v1/meta"
 import "greptime/v1/meta/common.proto";
 
 service Router {
-  rpc Create(CreateRequest) returns (RouteResponse) {}
-  
   // Fetch routing information for tables. The smallest unit is the complete
   // routing information(all regions) of a table.
   //
@@ -43,16 +41,6 @@ service Router {
   // ```
   //
   rpc Route(RouteRequest) returns (RouteResponse) {}
-
-  rpc Delete(DeleteRequest) returns (RouteResponse) {}
-}
-
-message CreateRequest {
-  RequestHeader header = 1;
-
-  TableName table_name = 2;
-  repeated Partition partitions = 3;
-  bytes table_info = 4;
 }
 
 message RouteRequest {
@@ -61,12 +49,6 @@ message RouteRequest {
   repeated TableId table_ids = 3;
 }
 
-message DeleteRequest {
-  RequestHeader header = 1;
-  TableName table_name = 2;
-  TableId table_id = 3;
-}
-
 message RouteResponse {
   ResponseHeader header = 1;