qssi: Remove unused video property

Remove unused video property.

Change-Id: I732d6c7697678a28f8d9a35d98b367064dd95fc0
diff --git a/system.prop b/system.prop
index 403a7bf..3ffea6f 100644
--- a/system.prop
+++ b/system.prop
@@ -39,7 +39,6 @@
 media.stagefright.thumbnail.prefer_hw_codecs=true
 mmp.enable.3g2=true
 media.aac_51_output_enabled=true
-mm.enable.smoothstreaming=true
 media.settings.xml=/vendor/etc/media_profiles_vendor.xml
 #16777215 is decimal sum of supported codecs in AAL
 #codecs:(PARSER_)AAC AC3 AMR_NB AMR_WB ASF AVI DTS FLV 3GP 3G2 MKV MP2PS MP2TS MP3 OGG QCP WAV FLAC AIFF APE DSD MOV MHAS