libobs: Rename OBS_NIX_PLATFORM_X11_GLX to OBS_NIX_PLATFORM_INVALID

Deprecated in 28.0.
Renamed so that the values of non-deprecated members stay the same.

libobs/obs-nix-platform.c

@@ -25,10 +25,7 @@ static void *obs_nix_platform_display = NULL;
 
 void obs_set_nix_platform(enum obs_nix_platform_type platform)
 {
-	PRAGMA_WARN_PUSH
-	PRAGMA_WARN_DEPRECATION
-	assert(platform != OBS_NIX_PLATFORM_X11_GLX);
-	PRAGMA_WARN_POP
+	assert(platform != OBS_NIX_PLATFORM_INVALID);
 	obs_nix_platform = platform;
 }
 

libobs/obs-nix-platform.h

@@ -24,7 +24,7 @@ extern "C" {
 #endif
 
 enum obs_nix_platform_type {
-	OBS_NIX_PLATFORM_X11_GLX OBS_DEPRECATED,
+	OBS_NIX_PLATFORM_INVALID,
 	OBS_NIX_PLATFORM_X11_EGL,
 	OBS_NIX_PLATFORM_WAYLAND,
 };