gnbug: Unbind command variable.

The command variable is not used. Besides, it is easy to confuse it
with the sub-commands.

* gnbug (main): Unbind command variable.

1 files changed, 1 insertions, 1 deletions

diff --git a/gnbug b/gnbug
index 3810ac9..f79d529 100755
--- a/gnbug
+++ b/gnbug
@@ -456,7 +456,7 @@ To get usage information for one of these sub-commands, run
 
 (define main
   (match-lambda*
-    ((command "--help")
+    ((_ "--help")
      (print-usage))
     ((_ command args ...)
      (apply (match command