sudo not required explicitly as /bin/ip netns identify is part of READ_ONLY_CMDS in sudoers file (#16115)

Why I did it
Few commands in multiasic platforms when run with the "sudo ip netns exec asic0 " option was taking like 15 mins to get the o/p. This behavior of sudo getting hung was seen by just doing this

jujoseph@svcstr-server-2:~ sudo ip netns exec asic0 bash
jujoseph@svcstr-server-2:~ sudo ls

deally sudo is not needed as we have /bin/ip netns identify present in /etc/sudoers file. Hence removing it

Author: judyjoseph

src/sonic-py-common/sonic_py_common/multi_asic.py

@@ -157,7 +157,7 @@ def get_current_namespace(pid=None):
     """
 
     net_namespace = None
-    command = ["sudo", '/bin/ip', 'netns', 'identify', "{}".format(os.getpid() if not pid else pid)]
+    command = ['/bin/ip', 'netns', 'identify', "{}".format(os.getpid() if not pid else pid)]
     proc = subprocess.Popen(command,
                             stdout=subprocess.PIPE,
                             universal_newlines=True,