meson: Remove redundant udevrules list

This was left over after the change in configuration strategy in the
previous commit.

Fixes: 20017150d229 ("meson: Improve maintainability of build options")
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: Icd7547fd06176440a760debd67aed5048681d688
diff --git a/meson.build b/meson.build
index b6b8708..ebd77b6 100644
--- a/meson.build
+++ b/meson.build
@@ -12,12 +12,6 @@
 
 udev = dependency('udev')
 udevdir = udev.get_pkgconfig_variable('udevdir')
-udevrules = [
-	'debug-trigger-kcs1',
-	'debug-trigger-kcs2',
-	'debug-trigger-kcs3',
-	'debug-trigger-kcs4',
-]
 
 triggers = get_option('triggers')
 foreach trigger : triggers