removed unnecessary statement

Author: dde-fite

README.md

@@ -250,9 +250,6 @@ to the library routines. The mlx_release function can be used at the end
 of the program to disconnect from the graphic system and release
 resources.
 
-If **mlx_init()** fails to set up the connection to the display, it will
-return None.
-
 ### Return values
 
 If **mlx_init()** set up the connection to the display correctly, it