Disable flaky test on nexus, again

Change-Id: Ifbb998d856b08417622f967c7a62cd22066c3696

shodan_boot.robot

diff --git a/shodan_boot.robot b/shodan_boot.robot
index 4b96e47..1633b2a 100644
--- a/shodan_boot.robot
+++ b/shodan_boot.robot
@@ -62,6 +62,7 @@
 
 # TODO b/329673199 test is flaky on nexus platform
 Test SDK + TimerService (oneshot & periodic)
+    Skip if                     "${PLATFORM}" == "nexus"
     Requires                    shodan-bootup
     Install App                 timer
     Wait For Line On Uart       sdk_timer_cancel returned Err(SDKInvalidTimer) with nothing running