removed unused module references

lib/address.js

@@ -1,8 +1,6 @@
 var base58check = require('./base58check');
 var constants = require('./constants');
 var Hash = require('./hash');
-var Pubkey = require('./pubkey');
-var Script = require('./script');
 
 function Address(buf) {
   if (!(this instanceof Address))

lib/identity.js

@@ -1,9 +1,6 @@
 var base58check = require('./base58check');
 var constants   = require('./constants');
 var Hash        = require('./hash');
-var Pubkey      = require('./pubkey');
-var Script      = require('./script');
-var Random      = require('./random');
 
 function Identity(buf) {
   // TODO: instantiate identities without providing any configuration

lib/kdf.js

@@ -1,7 +1,6 @@
 var Bn = require('./bn');
 var Privkey = require('./privkey');
 var Point = require('./point');
-var Pubkey = require('./pubkey');
 var Keypair = require('./keypair');
 var Hash = require('./hash');
 

lib/keypair.js

@@ -1,7 +1,5 @@
 var Privkey = require('./privkey');
 var Pubkey = require('./pubkey');
-var BN = require('./bn');
-var point = require('./point');
 
 var Keypair = function Keypair(obj) {  
   if (!(this instanceof Keypair))

lib/message.js

@@ -1,7 +1,5 @@
 var ECDSA = require('./ecdsa');
 var Keypair = require('./keypair');
-var Privkey = require('./privkey');
-var Pubkey = require('./pubkey');
 var BufferWriter = require('./bufferwriter');
 var Hash = require('./hash');
 var Address = require('./address');

lib/signature.js

@@ -1,6 +1,4 @@
 var BN = require('./bn');
-var Point = require('./point');
-var Pubkey = require('./pubkey');
 
 var Signature = function Signature(r, s) {
   if (!(this instanceof Signature))