sha1-lookup: remove sha1_entry_pos() from header file

Since f1068ef (sha1_file: drop experimental GIT_USE_LOOKUP search, 2017-08-09)
the definition of sha1_entry_pos() has been removed from "sha1-lookup.c", so
there is no need anymore for its declaration in "sha1-lookup.h".

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: chriscool

sha1-lookup.h

@@ -7,10 +7,4 @@ extern int sha1_pos(const unsigned char *sha1,
 		    void *table,
 		    size_t nr,
 		    sha1_access_fn fn);
-
-extern int sha1_entry_pos(const void *table,
-			  size_t elem_size,
-			  size_t key_offset,
-			  unsigned lo, unsigned hi, unsigned nr,
-			  const unsigned char *key);
 #endif