communication: Add remove_data

prog/communication.py

@@ -228,4 +228,10 @@ class DownloadServer(FuncCaller):
                 out[filename] = f.read()
         return out
 
-
+    @server_exec()
+    async def remove_data(self, dt: datetime):
+        path = "data/realtime/"+dt_to_path(dt)
+        out = {}
+        for filename in os.listdir(path):
+            os.remove(path+'/'+filename)
+        os.rmdir(path)