diff --git a/mylib.c b/mylib.c
deleted file mode 100644
index 667fc31..0000000
--- a/mylib.c
+++ /dev/null
@@ -1,65 +0,0 @@
-#define __LIBRARY__
-#include <unistd.h>
-#include <stdarg.h>
-#include <string.h>
-#include <stdlib.h>
-
-#define	EINVAL	4
-
-extern char ** environ;
-#define	__environ	environ
-
-char * ___strtok;
-volatile int errno;
-
-_syscall1(int,setup,void *,BIOS)
-
-volatile void exit(int exit_code)
-{
-	__asm__("int $0x80"::"a" (__NR_exit),"b" (exit_code));
-	while(1); /* to avoid warning of compiler */
-}
-
-extern char _end;
-void * ___brk_addr = &_end;
-
-int brk(void * end_data_segment)
-{
-	long __res;
-	__asm__ volatile ("int $0x80"
-		: "=a" (__res)
-		: "0" (__NR_brk),"b" ((long)(end_data_segment)));
-	if (__res >= 0) {
-		___brk_addr = end_data_segment;
-		return (int) __res;
-	}
-	errno = -__res;
-	return -1;
-}
-
-void * sbrk(ptrdiff_t increment)
-{
-	char *oldbrk;
-
-	if (increment == 0)
-		return ___brk_addr;
-
-	oldbrk = ___brk_addr;
-	if (brk(oldbrk + increment) < 0)
-		return (char *) -1;
-
-	return oldbrk;
-}
-
-/* Return the value of the environment variable NAME.  */
-char * getenv(register const char *name)
-{
-  register const size_t len = strlen(name);
-  register char **ep;
-
-  for (ep = __environ; *ep != NULL; ++ep)
-    if (!strncmp(*ep, name, len) && (*ep)[len] == '=')
-      return &(*ep)[len + 1];
-
-  return NULL;
-}