remove dead code

lib/crypto/ecdsa.js

@@ -58,23 +58,6 @@ ECDSA.prototype.calci = function() {
 ECDSA.fromString = function(str) {
   var obj = JSON.parse(str);
   return new ECDSA(obj);
-
-  if (obj.hashbuf) {
-    this.hashbuf = new Buffer(obj.hashbuf, 'hex');
-  }
-  if (obj.pubkey) {
-    this.pubkey = PublicKey.fromString(obj.pubkey);
-  }
-  if (obj.privkey) {
-    this.privkey = PrivateKey.fromString(obj.privkey);
-  }
-  if (obj.sig) {
-    this.sig = Signature.fromString(obj.sig);
-  }
-  if (obj.k) {
-    this.k = BN(obj.k, 10);
-  }
-  return this;
 };
 
 ECDSA.prototype.randomK = function() {