Fix bug #5968466 system running out of memory during WebView performance test

- there can be only one Arabic "normal" fallback

Change-Id: I07f8123be0988bbb5b2fb23cc3fbf13870ef36c0
diff --git a/data/fonts/fallback_fonts.xml b/data/fonts/fallback_fonts.xml
index 044de2f..51b07e4 100644
--- a/data/fonts/fallback_fonts.xml
+++ b/data/fonts/fallback_fonts.xml
@@ -26,7 +26,6 @@
     <family>
         <fileset>
             <file>DroidSansArabic.ttf</file>
-            <file>DroidNaskh-Regular.ttf</file>
         </fileset>
     </family>
     <family>