opt stream ci test

tests/script/tsim/stream/sliding.sim

@@ -576,13 +576,6 @@ $loop_count = 0
 
 print step 7
 
-loop4:
-sleep 100
-
-$loop_count = $loop_count + 1
-if $loop_count == 10 then
-  return -1
-endi
 
 sql create database test3 vgroups 6;
 sql use test3;