Drop explict 3 seconds pause between two object updates/deletes. (sonic-net#1359)

- What I did
Drop explicitly introduced 3 seconds pause between object updates using configlet.

- How I did it
Remove the added time.sleep(3)

- How to verify it
Add 10 objects using old code and see it takes 30+ seconds. Repeat the same with this updated code which would complete in small fraction of a second.

Verified ASIC-DB contents to the extent possible in both scenarios of applying objects using old code with 3 seconds pause and new code w/o any explicit pause, to be the same.

Author: renukamanavalan

scripts/configlet

@@ -77,7 +77,6 @@ A sample for update:
 
 import argparse
 import json
-import time
 
 from swsssdk import ConfigDBConnector
 
@@ -204,11 +203,6 @@ def main():
             if parse_only == False:
                 for i in data:
                     process_entry (do_update, i)
-                    # Artificial sleep to give a pause between two entries
-                    # so as to ensure that all internal daemons have digested the 
-                    # previous update, before the next one arrives.
-                    #
-                    time.sleep(3)
             else:
                 print("Parsed:")
                 print(data)