egl/haiku: drop overwritten preset of EGL version

`init_haiku()` is called by `eglInitialize()`, which then calls
`_eglComputeVersion()` (without even anything in between). The latter
sets the EGL version based on the extensions supported, and since Haiku
doesn't support any it will end up overwriting the same `1.4` value.

Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Frank Binns <frank.binns@imgtec.com>
Part-of: <mesa/mesa!6131>
70 jobs for !6131 with haiku-drop-egl-version-preset in 14 minutes and 54 seconds (queued for 7 seconds)
merge request