remove uneeded file

libs/remix-debug/src/trace/traceRetriever.js

-'use strict'
-
-function TraceRetriever (options) {
-  this.web3 = options.web3
-}
-
-TraceRetriever.prototype.getTrace = function (txHash, callback) {
-  const options = {
-    disableStorage: true,
-    disableMemory: false,
-    disableStack: false,
-    fullStorage: false
-  }
-  this.web3.debug.traceTransaction(txHash, options, function (error, result) {
-    callback(error, result)
-  })
-}
-
-module.exports = TraceRetriever