Remove duplicate resource import

Changes:
     Resource lib/ipmi_client.robot file imported twice

Tested:
     NA
Change-Id: I788b177d8b240754bd7998261b0007ee08a13599
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/network/test_vlan_network.robot b/network/test_vlan_network.robot
index 1b6a4c8..73106bc 100644
--- a/network/test_vlan_network.robot
+++ b/network/test_vlan_network.robot
@@ -7,7 +7,6 @@
 Resource                        ../lib/utils.robot
 Resource                        ../lib/common_utils.robot
 Resource                        ../lib/openbmc_ffdc.robot
-Resource                        ../lib/ipmi_client.robot
 Resource                        ../lib/bmc_network_utils.robot
 Resource                        ../lib/state_manager.robot
 Library                         ../lib/utilities.py