Accept Merge Request #86: (api -> master)

Merge Request: Add back label api

Created By: @王琼钰
Accepted By: @王琼钰
URL: https://tjwater.coding.net/p/tjwatercloud/d/TJWaterServer/git/merge/86

api/s26_labels.py

@@ -95,6 +95,10 @@ def delete_label_cache(name: str, cs: ChangeSet) -> SqlChangeSet:
     return SqlChangeSet(redo_sql, undo_sql, redo_cs, undo_cs)
 
 
+def delete_label(name: str, cs: ChangeSet) -> ChangeSet:
+    return execute_command(name, delete_label_cache(name, cs))
+
+
 class InpLabel:
     def __init__(self, line: str) -> None:
         tokens = line.split()