input: moved getSatoshisBuffer to general input

lib/transaction/input/multisigscripthash.js

@@ -89,13 +89,6 @@ MultiSigScriptHashInput.prototype.getScriptCode = function() {
   return writer.toBuffer();
 };
 
-MultiSigScriptHashInput.prototype.getSatoshisBuffer = function() {
-  $.checkState(this.output instanceof Output);
-  $.checkState(this.output._satoshisBN);
-  var buffer = new BufferWriter().writeUInt64LEBN(this.output._satoshisBN).toBuffer();
-  return buffer;
-};
-
 MultiSigScriptHashInput.prototype.getSighash = function(transaction, privateKey, index, sigtype) {
   var self = this;
   var hash;