Remove unused -sse (CFG_SSE) option

This is a left-over from the cleanup of MMX/3dNow!/SSE support, which we
no longer have in Qt.

Change-Id: I48388710a499bddb518ae3c2b8a4ad989482f58c
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>

configure

@@ -611,7 +611,6 @@ CFG_OPENVG_LC_INCLUDES=no
 CFG_OPENVG_SHIVA=auto
 CFG_OPENVG_ON_OPENGL=auto
 CFG_EGL=auto
-CFG_SSE=auto
 CFG_FONTCONFIG=auto
 CFG_FREETYPE=auto
 CFG_HARFBUZZ=no
@@ -1157,13 +1156,6 @@ while [ "$#" -gt 0 ]; do
     libexecdir)
         QT_INSTALL_LIBEXECS="$VAL"
         ;;
-    sse)
-        if [ "$VAL" = "yes" ] || [ "$VAL" = "no" ]; then
-            CFG_SSE="$VAL"
-        else
-            UNKNOWN_OPT=yes
-        fi
-	;;
     opengl)
         if  [ "$VAL" = "auto" ] || [ "$VAL" = "desktop" ] ||
             [ "$VAL" = "yes" ] || [ "$VAL" = "no" ] ||