Remove sentence describing GLFW-specific behavior. This describes the behavior of glfwUpdateGamepadMappings, whose behavior is a mix between the two related SDL functions, but is not part of the format.
@@ -786,7 +786,6 @@ functions.
There is also the special `platform` field that specifies which platform the
mapping is valid for. Possible values are `Windows`, `Mac OS X` and `Linux`.
-Mappings without this field will always be considered valid.
Below is an example of what a gamepad mapping might look like. It is the
one built into GLFW for Xbox controllers accessed via the XInput API on Windows.