Remove gamma slider; keep HDR brightness

Wayland/XWayland discards window gamma ramps, so mat_monitorgamma could not
work on the development setup. Drop the slider, config key and readback.
Keep the in-engine HDR tonemap brightness and document that Fullbright turns
tonemapping off.

1 files changed, 0 insertions, 1 deletions

diff --git a/src/hl2h.h b/src/hl2h.h
index a050feb..f1e72be 100644
--- a/src/hl2h.h
+++ b/src/hl2h.h
@@ -248,7 +248,6 @@ extern bool g_auto_crouchjump;
 extern bool g_edge_jump;
 extern int g_fov_camera;
 extern int g_fov_viewmodel;
-extern int g_gamma;
 extern int g_tonemap;
 extern int g_esp_col_hostile[3];
 extern int g_esp_col_neutral[3];