refactor: Remove unused FNV-1a hash function (#398)

Author: mvasilkov

src/fnv1a.ts

@@ -11,10 +11,7 @@ require('chai/register-expect');
 
 const BSON = require('../lib/bson');
 const { ensureBuffer } = require('../lib/ensure_buffer');
-const { fnv1a24, fnv1a32 } = require('../lib/fnv1a');
 
 BSON.ensureBuffer = ensureBuffer;
-BSON.fnv1a24 = fnv1a24;
-BSON.fnv1a32 = fnv1a32;
 
 module.exports = BSON;