Remove unused Python imports for LGTM

Author: bocon13

tests/p4rt/acl.py

@@ -1,9 +1,7 @@
 # Lint as: python3
 from swsscommon import swsscommon
 
-import time
 import util
-import json
 
 INGRESS_STAGE = "SAI_ACL_STAGE_INGRESS"
 EGRESS_STAGE = "SAI_ACL_STAGE_EGRESS"

tests/p4rt/l3.py

@@ -1,6 +1,5 @@
 from swsscommon import swsscommon
 
-import time
 import util
 import json
 

tests/p4rt/test_l3.py

@@ -1,6 +1,5 @@
 from swsscommon import swsscommon
 
-import time
 import pytest
 import json
 import util

tests/p4rt/test_p4rt_acl.py

@@ -1,9 +1,7 @@
 # Lint as: python3
 from swsscommon import swsscommon
 
-import time
 import pytest
-import json
 import util
 import acl
 

tests/p4rt/test_p4rt_mirror.py

@@ -1,6 +1,5 @@
 from swsscommon import swsscommon
 
-import time
 import util
 import json
 

tests/p4rt/util.py

@@ -1,7 +1,6 @@
 """ Defines common P4RT utility functions."""
 from swsscommon import swsscommon
 
-import json
 import time