Remove murmur hash, it's endian dependent and has unreasonable alignment

requirements

include/ucore/hash.h

@@ -22,9 +22,6 @@ uc_hash64shift(uint64_t key);
 uint32_t 
 uc_hashuint(uint32_t a);
 
-uint32_t 
-uc_murmurmash2(const void *key, int len, uint32_t seed );
-
 uint32_t
 uc_pjwhash(const char *str,size_t len);
 

src/murmurhash.c

@@ -1,55 +0,0 @@
-#include "ucore/hash.h"
-
-// 'm' and 'r' are mixing constants generated offline.
-// They're not really 'magic', they just happen to work well.
-#define m  0x5bd1e995
-#define r  24
-
-uint32_t 
-uc_murmurmash2(const void *key, int len, uint32_t seed )
-{
-
-
-    // Initialize the hash to a 'random' value
-
-    uint32_t h = seed ^ len;
-
-    // Mix 4 bytes at a time into the hash
-
-    const unsigned char * data = (const unsigned char *)key;
-
-    while (len >= 4)
-    {
-        uint32_t k = *(const uint32_t *)data;
-
-        k *= m; 
-        k ^= k >> r; 
-        k *= m; 
-        
-        h *= m; 
-        h ^= k;
-
-        data += 4;
-        len -= 4;
-    }
-    
-    // Handle the last few bytes of the input array
-
-    switch (len)
-    {
-    case 3: h ^= data[2] << 16;
-    case 2: h ^= data[1] << 8;
-    case 1: h ^= data[0];
-            h *= m;
-    };
-
-    // Do a few final mixes of the hash to ensure the last few
-    // bytes are well-incorporated.
-
-    h ^= h >> 13;
-    h *= m;
-    h ^= h >> 15;
-
-    return h;
-} 
-