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packs, deltas: remove dead code

--- a/delta.c

+++ b/delta.c

@@ -26,12 +26,6 @@

 	int	sz;

 };

-static u64int

-addh(u64int h, uchar v)

-{

-	return h + v;

-}

-

 static void

 addblk(Dtab *dt, void *buf, int len, int off, u64int rh)

 {

--- a/pack.c

+++ b/pack.c

@@ -286,26 +286,6 @@

 }

 static int

-hashsearch(Hash *hlist, int nent, Hash h)

-{

-	int hi, lo, mid, d;

-

-	lo = 0;

-	hi = nent;

-	while(lo < hi){

-		mid = (lo + hi)/2;

-		d = memcmp(hlist[mid].h, h.h, sizeof h.h);

-		if(d < 0)

-			lo = mid + 1;

-		else if(d > 0)

-			hi = mid;

-		else

-			return mid;

-	}

-	return -1;

-}

-

-static int

 applydelta(Object *dst, Object *base, char *d, int nd)

 {

 	char *r, *b, *ed, *er;

@@ -919,7 +899,8 @@

 	cache(obj);

 	return obj;

 error:

-	Bterm(f);

+	if(f != nil)

+		Bterm(f);

 	free(d);

 	free(new);

 	return nil;

@@ -1165,8 +1146,6 @@

 static void

 addmeta(Objmeta **m, int *nm, int type, Hash h, char *path, vlong mtime)

 {

-	static Objset os;

-

 	*m = erealloc(*m, (*nm + 1)*sizeof(Objmeta));

 	memset(&(*m)[*nm], 0, sizeof(Objmeta));

 	(*m)[*nm].type = type;

--- a/repack.c

+++ b/repack.c

@@ -1,6 +1,5 @@

 #include <u.h>

 #include <libc.h>

-#include <pool.h>

 #include "git.h"