Revert "Everflow T2 topo support and ipv6 egress tests (#6225)"

This reverts commit c3f0980.

Author: StormLiangMS

tests/everflow/conftest.py

@@ -1,26 +0,0 @@
-import pytest
-import logging
-
-
-@pytest.fixture(autouse=True, scope="package")
-def setup_recycle_port(duthosts, tbinfo):
-    """Setup recycle port ip address on t2 topo"""
-    if "t2" not in tbinfo['topo']['name']:
-        return
-    for duthost in duthosts.frontend_nodes:
-        for asic in duthost.asics:
-            cmd = "sudo config interface -n {ns} ip add Ethernet-Rec{rec} 1.1.1.{an}/32".format(ns=asic.namespace,
-                                                                                                rec=asic.asic_index,
-                                                                                                an=asic.asic_index+1)
-            logging.info(cmd)
-            duthost.command(cmd)
-        duthost.command("sudo config save -y")
-    yield
-    for duthost in duthosts.frontend_nodes:
-        for asic in duthost.asics:
-            cmd = "sudo config interface -n {ns} ip remove Ethernet-Rec{rec} 1.1.1.{an}/32".format(ns=asic.namespace,
-                                                                                                   rec=asic.asic_index,
-                                                                                                   an=asic.asic_index+1)
-            logging.info(cmd)
-            duthost.command(cmd)
-        duthost.command("sudo config save -y")