rm initial_skipped_duration from start wf request

Author: feiyang3cat

temporal/api/workflowservice/v1/request_response.proto

@@ -203,11 +203,6 @@ message StartWorkflowExecutionRequest {
     // Time-skipping configuration. If not set, time skipping is disabled.
     temporal.api.workflow.v1.TimeSkippingConfig time_skipping_config = 29;
 
-    // If a workflow execution is started by a previous execution (parent-child workflow or continue-as-new) 
-    // that has already skipped some time, the accumulated skipped duration from that execution 
-    // can be passed to the new workflow execution through this field.
-    google.protobuf.Duration initial_skipped_duration = 30;
-
 }
 
 message StartWorkflowExecutionResponse {