Fixed murmur hash function signature and removed seed_high_bits test as it's no longer relevant

tests/ev_hash/meson.build

@@ -1,5 +1,4 @@
 tests = [
-  'seed_high_bits',
 ]
 
 foreach t : tests

tests/ev_hash/seed_high_bits.c

@@ -1,22 +0,0 @@
-#define EV_HASH_IMPLEMENTATION
-#include "ev_macros.h"
-#include "ev_hash.h"
-
-#include <assert.h>
-#include <string.h>
-
-int main(void)
-{
-  const char *data = "same input";
-
-  u64 low_seed = 1;
-  u64 high_seed = (1ull << 32) | 1ull;
-
-  u64 low_hash = ev_hash_murmur3(data, (u32)strlen(data), low_seed);
-  u64 high_hash = ev_hash_murmur3(data, (u32)strlen(data), high_seed);
-
-  assert(low_seed != high_seed);
-  assert(low_hash != high_hash);
-
-  return 0;
-}