remove unused variable (value is always true)

src/app.js

@@ -313,9 +313,7 @@ Please make a backup of your contracts and start using http://remix.ethereum.org
   registry.put({api: self._components.compilersArtefacts, name: 'compilersartefacts'})
 
   // ----------------- UniversalDApp -----------------
-  var udapp = new UniversalDApp({
-    removable_instances: true
-  })
+  var udapp = new UniversalDApp({})
   registry.put({api: udapp, name: 'udapp'})
 
   var udappUI = new UniversalDAppUI(udapp)

src/universal-dapp-ui.js

@@ -38,10 +38,8 @@ UniversalDAppUI.prototype.renderInstanceFromABI = function (contractABI, address
     ${copyToClipboard(() => address)}
   </div>`
 
-  if (self.udapp.removable_instances) {
-    var close = yo`<div class="${css.udappClose}" onclick=${remove}><i class="${css.closeIcon} fa fa-close" aria-hidden="true"></i></div>`
-    title.appendChild(close)
-  }
+  var close = yo`<div class="${css.udappClose}" onclick=${remove}><i class="${css.closeIcon} fa fa-close" aria-hidden="true"></i></div>`
+  title.appendChild(close)
 
   function remove () {
     instance.remove()

src/universal-dapp.js

@@ -27,7 +27,6 @@ function UniversalDApp (opts, localRegistry) {
   self.data = {}
   self._components = {}
   self._components.registry = localRegistry || globalRegistry
-  self.removable_instances = opts.removable_instances
   self._deps = {
     config: self._components.registry.get('config').api,
     compilersartefacts: self._components.registry.get('compilersartefacts').api,