binder: rm utils/Debug.h as unutilized

Change-Id: I52eb8b64b71cec7ffd4560e902daf358fda98b4a
diff --git a/libs/binder/IBatteryStats.cpp b/libs/binder/IBatteryStats.cpp
index 6469b08..5702151 100644
--- a/libs/binder/IBatteryStats.cpp
+++ b/libs/binder/IBatteryStats.cpp
@@ -16,7 +16,6 @@
 
 #include <binder/IBatteryStats.h>
 
-#include <utils/Debug.h>
 #include <utils/Log.h>
 #include <binder/Parcel.h>
 #include <utils/String8.h>