Removing non working expired certificate testcases

Change-Id: I2936219c7a0ed4c3b28e89c04bf7e237f71747a1
Signed-off-by: Rahul Maheshwari <rahulmaheshwari@in.ibm.com>
diff --git a/redfish/managers/test_certificate.robot b/redfish/managers/test_certificate.robot
index b332816..54969cc 100644
--- a/redfish/managers/test_certificate.robot
+++ b/redfish/managers/test_certificate.robot
@@ -22,7 +22,6 @@
     Server                Empty Certificate Valid Privatekey  error
     Server                Valid Certificate Empty Privatekey  error
     Server                Empty Certificate Empty Privatekey  error
-    Server                Expired Certificate                 error
 
 
 Verify Client Certificate Replace
@@ -35,7 +34,6 @@
     Client                Empty Certificate Valid Privatekey  error
     Client                Valid Certificate Empty Privatekey  error
     Client                Empty Certificate Empty Privatekey  error
-    Client                Expired Certificate                 error
 
 
 Verify Client Certificate Install