pass executionContext as param instead of relying in a global var

package.json

@@ -143,11 +143,10 @@
     "remix-ide": "./bin/remix-ide"
   },
   "scripts": {
-    "setupremix": "npm run linkremixdebug && npm run linkremixlib && npm run linkremixsolidity && npm run linkremixanalyzer && npm run linkremixtests && npm run linkremixsimulator",
+    "setupremix": "npm run linkremixdebug && npm run linkremixlib && npm run linkremixsolidity && npm run linkremixanalyzer && npm run linkremixtests",
     "pullremix": "git clone https://github.com/ethereum/remix",
     "linkremixlib": "cd node_modules && rm -rf remix-lib && ln -s ../../remix/remix-lib remix-lib && cd ..",
     "linkremixsolidity": "cd node_modules && rm -rf remix-solidity && ln -s ../../remix/remix-solidity remix-solidity && cd ..",
-    "linkremixsimulator": "cd node_modules && rm -rf remix-simulator && ln -s ../../remix/remix-simulator remix-simulator && cd ..",
     "linkremixtests": "cd node_modules && rm -rf remix-tests && ln -s ../../remix/remix-tests remix-tests && cd ..",
     "linkremixdebug": "cd node_modules && rm -rf remix-debug && ln -s ../../remix/remix-debug remix-debug && cd ..",
     "linkremixanalyzer": "cd node_modules && rm -rf remix-analyzer && ln -s ../../remix/remix-analyzer remix-analyzer && cd ..",

src/app/panels/main-view.js

 var yo = require('yo-yo')
 var EventManager = require('../../lib/events')
 
-var executionContext = require('../../execution-context')
-
 var Terminal = require('./terminal')
 var globalRegistry = require('../../global/registry')
 var { TabProxy } = require('./tab-proxy.js')

src/app/tabs/debugger-tab.js

@@ -2,7 +2,6 @@ var yo = require('yo-yo')
 var css = require('./styles/debugger-tab-styles')
 
 var DebuggerUI = require('./debugger/debuggerUI')
-var executionContext = require('../../execution-context')
 
 import { ViewPlugin } from '@remixproject/engine'
 import * as packageJson from '../../../package.json'