Fix checkbuild

Fix build breakage introduced by
I2e2acb15d1bc05c6ba09563a87d5baceebe7ebd9

Bug: 26936282
Change-Id: I944d758afd4d026a2d30b6816d88356a97ca70a5
diff --git a/cmds/servicemanager/bctest.c b/cmds/servicemanager/bctest.c
index fd91633..6466654 100644
--- a/cmds/servicemanager/bctest.c
+++ b/cmds/servicemanager/bctest.c
@@ -58,7 +58,6 @@
 
 int main(int argc, char **argv)
 {
-    int fd;
     struct binder_state *bs;
     uint32_t svcmgr = BINDER_SERVICE_MANAGER;
     uint32_t handle;