tsort: fix wrong header inclusion
diff --git a/src/tsort.c b/src/tsort.c
index 70ed589..84f4d61 100644
--- a/src/tsort.c
+++ b/src/tsort.c
@@ -1,11 +1,5 @@
-#include <stdio.h>
-#include <string.h>
-#include <stdint.h>
-#include <stdlib.h>
-
-#ifndef GIT_WIN32
#include <common.h>
-#endif
+
/**
* An array-of-pointers implementation of Python's Timsort
* Based on code by Christopher Swenson under the MIT license