No Issue - stop spewing useless xfo < CSP warning in non-debug builds

This warning throws off a lot of users reporting issues. It's not even
a proper warning as it's informative at best.
Leave it in for debug builds, but stop spewing these common notices in
release builds.

docshell/base/nsDSURIContentListener.cpp

@@ -427,6 +427,7 @@ ShouldIgnoreFrameOptions(nsIChannel* aChannel, nsIPrincipal* aPrincipal)
     return false;
   }
 
+#ifdef DEBUG
   // log warning to console that xfo is ignored because of CSP
   nsCOMPtr<nsILoadInfo> loadInfo = aChannel->GetLoadInfo();
   uint64_t innerWindowID = loadInfo ? loadInfo->GetInnerWindowID() : 0;
@@ -440,7 +441,7 @@ ShouldIgnoreFrameOptions(nsIChannel* aChannel, nsIPrincipal* aPrincipal)
                       0,             // no columnnumber
                       nsIScriptError::warningFlag,
                       "CSP", innerWindowID);
-
+#endif
   return true;
 }