Remove redundant code from uptime test

OBMC Reboot (off) keyword has in-built logic to check for standby.

Resolves  openbmc/openbmc-test-automation#1338

Change-Id: Ifb360464fe42fe946d415dcc2df8eb515c4bb554
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/tests/test_basic_poweron.robot b/tests/test_basic_poweron.robot
index 9ef2cb5..c690237 100644
--- a/tests/test_basic_poweron.robot
+++ b/tests/test_basic_poweron.robot
@@ -53,8 +53,6 @@
     [Tags]  Verify_Uptime_Average_Against_Threshold
 
     OBMC Reboot (off)
-    Wait Until Keyword Succeeds
-    ...  3 min  0 sec  Wait for BMC state  Ready
     ${uptime}=  Measure BMC Boot Time
     Should Be True  ${uptime} < 180
     ...  msg=${uptime} exceeds threshold.