remove unneded debug method

src/app/debugger/debugger.js

@@ -96,13 +96,4 @@ Debugger.prototype.registerAndHighlightCodeItem = function (index) {
   }
 }
 
-/**
- * Start debugging using Remix
- *
- * @param {String} txHash    - hash of the transaction
- */
-Debugger.prototype.debug = function (txHash, cb) {
-  this.debugger.web3.eth.getTransaction(txHash, cb)
-}
-
 module.exports = Debugger

src/app/debugger/debuggerUI.js

@@ -150,7 +150,7 @@ class DebuggerUI {
 
   debug (txHash) {
     const self = this
-    this.transactionDebugger.debug(txHash, (error, tx) => {
+    this.transactionDebugger.debugger.web3.eth.getTransaction(txHash, (error, tx) => {
       if (error) {
         return console.error("coudn't get txHash: " + error)
       }