Revert "create preprocessor for easy grid"

This reverts commit aa28b815d40a7ddfc4288031acf5032ee5464caf.

src/client/js/util/GrowiRenderer.js

@@ -2,7 +2,6 @@ import MarkdownIt from 'markdown-it';
 
 import Linker from './PreProcessor/Linker';
 import CsvToTable from './PreProcessor/CsvToTable';
-import EasyGrid from './PreProcessor/EasyGrid';
 import XssFilter from './PreProcessor/XssFilter';
 
 import EmojiConfigurer from './markdown-it/emoji';
@@ -38,7 +37,6 @@ export default class GrowiRenderer {
     }
     else {
       this.preProcessors = [
-        new EasyGrid(appContainer),
         new Linker(appContainer),
         new CsvToTable(appContainer),
         new XssFilter(appContainer),

src/client/js/util/PreProcessor/EasyGrid.js

@@ -1,10 +0,0 @@
-export default class EasyGrid {
-
-  process(markdown) {
-    // see: https://regex101.com/r/WR6IvX/3
-    return markdown.replace(/:::\s*editable-row[\r\n]((.|[\r\n])*):::/, (all, group) => {
-      return group;
-    });
-  }
-
-}