Libcutils: Remove unused variable

Change-Id: I95eed017e78468c4946b2a5b62b6fe92e256673e
diff --git a/libcutils/debugger.c b/libcutils/debugger.c
index 2cd8ec3..4558719 100644
--- a/libcutils/debugger.c
+++ b/libcutils/debugger.c
@@ -43,7 +43,6 @@
 }
 
 static int make_dump_request(debugger_action_t action, pid_t tid, int timeout_secs) {
-  const char* socket_name;
   debugger_msg_t msg;
   memset(&msg, 0, sizeof(msg));
   msg.tid = tid;