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diff --git a/kitten/include/lwk/delay.h b/kitten/include/lwk/delay.h
deleted file mode 100644
index c16675d..0000000
--- a/kitten/include/lwk/delay.h
+++ /dev/null
@@ -1,50 +0,0 @@
-#ifndef _LWK_DELAY_H
-#define _LWK_DELAY_H
-
-/*
- * Copyright (C) 1993 Linus Torvalds
- *
- * Delay routines, using a pre-computed "loops_per_jiffy" value.
- */
-
-extern unsigned long loops_per_jiffy;
-
-#include <arch/delay.h>
-
-/*
- * Using udelay() for intervals greater than a few milliseconds can
- * risk overflow for high loops_per_jiffy (high bogomips) machines. The
- * mdelay() provides a wrapper to prevent this.  For delays greater
- * than MAX_UDELAY_MS milliseconds, the wrapper is used.  Architecture
- * specific values can be defined in asm-???/delay.h as an override.
- * The 2nd mdelay() definition ensures GCC will optimize away the 
- * while loop for the common cases where n <= MAX_UDELAY_MS  --  Paul G.
- */
-
-#ifndef MAX_UDELAY_MS
-#define MAX_UDELAY_MS	5
-#endif
-
-#ifdef notdef
-#define mdelay(n) (\
-	{unsigned long __ms=(n); while (__ms--) udelay(1000);})
-#else
-#define mdelay(n) (\
-	(__builtin_constant_p(n) && (n)<=MAX_UDELAY_MS) ? udelay((n)*1000) : \
-	({unsigned long __ms=(n); while (__ms--) udelay(1000);}))
-#endif
-
-#ifndef ndelay
-#define ndelay(x)	udelay(((x)+999)/1000)
-#endif
-
-void calibrate_delay(void);
-void msleep(unsigned int msecs);
-unsigned long msleep_interruptible(unsigned int msecs);
-
-static inline void ssleep(unsigned int seconds)
-{
-	msleep(seconds * 1000);
-}
-
-#endif /* defined(_LWK_DELAY_H) */