Fix readme

Author: anat-gilenson

specification/securityinsights/resource-manager/readme.md

@@ -75,7 +75,6 @@ directive:
     from: Microsoft.SecurityInsights/preview/2021-03-01-preview/OnboardingStates.json
     where: $.definitions.SentinelOnboardingState
     reason: The SentinelOnboardingState does not support list by subscription. It's not a top-level resource. To get the SentinelOnboardingState, we should have a subscription as well as a resource group and Log Analytics workspace.
-    reason: The Setting does not support list by subscription. It's not a top-level resource. To get the Watchlist, we should have a subscription as well as a resource group and Log Analytics workspace. 
   - suppress: R4017
     from: Microsoft.SecurityInsights/preview/2021-03-01-preview/Incidents.json
     where: $.definitions.Incidents