Update readme

README.md

@@ -61,8 +61,7 @@ with the mouse.
 Alternatively, a Qt-based frontend is available in the Qt/ dir.
 Open PPSSPPQt.pro with Qt Creator.
 Install libsdl1.2 if you want to use USB Gamepad.
-For Ubuntu user (>= 12.10) :
-- Remove multimedia in PPSSPP.pro on line 3
+If the build has an error about finding mobility or multimedia:
 - Install the package "qtmobility-dev"
 
 Building for OSX