Enable CS1591: Missing XML comment for publicly visible type or member

Author: Youssef1313

Directory.Build.props

@@ -18,9 +18,8 @@
         not report warnings for missing comments.
 
         CS1573: Parameter 'parameter' has no matching param tag in the XML comment for 'parameter' (but other parameters do)
-        CS1591: Missing XML comment for publicly visible type or member 'Type_or_Member'
       -->
-    <NoWarn>$(NoWarn),1573,1591</NoWarn>
+    <NoWarn>$(NoWarn),1573</NoWarn>
   </PropertyGroup>
 
   <!-- The TFMs to build and test against. -->