[metacity] compositor: remove unused define

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 0c8b0ededc699b33b181c0faff81caca2ef0c3aa
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Jan 8 05:01:27 2017 +0200

    compositor: remove unused define

 src/compositor/compositor-xrender.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/src/compositor/compositor-xrender.c b/src/compositor/compositor-xrender.c
index 72bbb2c..0657320 100644
--- a/src/compositor/compositor-xrender.c
+++ b/src/compositor/compositor-xrender.c
@@ -200,8 +200,6 @@ typedef struct _MetaCompWindow
 
 #define SHADOW_OPACITY 0.66
 
-#define TRANS_OPACITY 0.75
-
 /* Gaussian stuff for creating the shadows */
 static double
 gaussian (double r,