udev: Remove rules for disabling Wayland if nomodeset

This rule is wrong. The way it's written it will Wayland iff:
1) nomodeset is passed
2) some DRM device registers
3) the DRM device is not SimpleDRM

The logic is wrong because:
* on systems without SimpleDRM rule 2 would fail
* on nvidia, which ignores `nomodeset`, rule 3 would match

So it is not disabling Wayland when it should, and it is when it shouldn't.

We don't need to disable Wayland now, we can let GDM try and if it does
not find any suitable DRM device it will automatically fall back to Xorg.

data/61-gdm.rules.in

@@ -15,16 +15,14 @@ ATTR{vendor}=="0x19e5", ATTR{device}=="0x1711", GOTO="gdm_disable_wayland"
 
 LABEL="gdm_pci_device_end"
 
-# disable Wayland if modesetting is disabled
-KERNEL!="card[0-9]*", GOTO="gdm_nomodeset_end"
-KERNEL=="card[0-9]-*", GOTO="gdm_nomodeset_end"
-SUBSYSTEM!="drm", GOTO="gdm_nomodeset_end"
-# but keep it enabled for simple framebuffer drivers
-DRIVERS=="simple-framebuffer", GOTO="gdm_nomodeset_end"
+# If this machine has a hardware GPU, take note
+KERNEL!="card[0-9]*", GOTO="gdm_hardware_gpu_end"
+KERNEL=="card[0-9]-*", GOTO="gdm_hardware_gpu_end"
+SUBSYSTEM!="drm", GOTO="gdm_hardware_gpu_end"
+DRIVERS=="simple-framebuffer", GOTO="gdm_hardware_gpu_end"
 IMPORT{parent}="GDM_MACHINE_HAS_VIRTUAL_GPU"
 ENV{GDM_MACHINE_HAS_VIRTUAL_GPU}!="1", RUN+="/usr/bin/touch /run/udev/gdm-machine-has-hardware-gpu"
-IMPORT{cmdline}="nomodeset", GOTO="gdm_disable_wayland"
-LABEL="gdm_nomodeset_end"
+LABEL="gdm_hardware_gpu_end"
 
 # The vendor nvidia driver has multiple modules that need to be loaded before GDM can make an
 # informed choice on which way to proceed, so force GDM to wait until NVidia's modules are