configure.ac: Remove unused check for futimes(3)

Reported-by: Chris Hofstaedtler <zeha@debian.org>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

configure.ac

@@ -39,7 +39,7 @@ dnl Checks for libraries.
 dnl shadow now uses the libc's shadow implementation
 AC_CHECK_HEADER([shadow.h],,[AC_MSG_ERROR([You need a libc with shadow.h])])
 
-AC_CHECK_FUNCS(arc4random_buf futimes \
+AC_CHECK_FUNCS(arc4random_buf \
 	getentropy getrandom \
 	lckpwdf lutimes \
 	updwtmpx innetgr \