chore(lint): cleanup unused variables in code (#1563)

packages/netlify-cms-core/src/valueObjects/AssetProxy.js

@@ -30,7 +30,7 @@ AssetProxy.prototype.toString = function () {
 };
 
 AssetProxy.prototype.toBase64 = function () {
-  return new Promise((resolve, reject) => {
+  return new Promise(resolve => {
     const fr = new FileReader();
     fr.onload = (readerEvt) => {
       const binaryString = readerEvt.target.result;
@@ -50,7 +50,7 @@ export function createAssetProxy(value, fileObj, uploaded = false, privateUpload
       response => (
         new AssetProxy(response.asset.url.replace(/^(https?):/, ''), null, true, response.asset)
       ),
-      error => new AssetProxy(value, fileObj, false)
+      () => new AssetProxy(value, fileObj, false)
     );  
   } else if (privateUpload) {
     throw new Error('The Private Upload option is only avaible for Asset Store Integration');

packages/netlify-cms-core/src/valueObjects/EditorComponent.js

@@ -1,40 +1,19 @@
-import PropTypes from 'prop-types';
-import { Component, Children } from 'react';
-import { List, Record, fromJS } from 'immutable';
+import { Record, fromJS } from 'immutable';
 import { isFunction } from 'lodash';
 
-const plugins = { editor: List() };
-
 const catchesNothing = /.^/;
+/* eslint-disable no-unused-vars */
 const EditorComponent = Record({
   id: null,
   label: 'unnamed component',
   icon: 'exclamation-triangle',
   fields: [],
   pattern: catchesNothing,
-  fromBlock(match) { return {}; },
+  fromBlock(match) { return {}; }, 
   toBlock(attributes) { return 'Plugin'; },
   toPreview(attributes) { return 'Plugin'; },
 });
-
-
-class Plugin extends Component {
-  static propTypes = {
-    children: PropTypes.element.isRequired,
-  };
-
-  static childContextTypes = {
-    plugins: PropTypes.object,
-  };
-
-  getChildContext() {
-    return { plugins };
-  }
-
-  render() {
-    return Children.only(this.props.children);
-  }
-}
+/* eslint-enable */
 
 export default function createEditorComponent(config) {
   const configObj = new EditorComponent({