Remove misleading dynamic text for split command

The splitter always splits into 2 - the number of blocks in the content is not relevant.

client/src/entrypoints/admin/telepath/widgets.js

@@ -298,13 +298,6 @@ class BoundDraftailWidget {
               icon: '#icon-cut',
               description: gettext('Split block'),
               type: 'split',
-              render: ({ option, getEditorState }) => {
-                const editorState = getEditorState();
-                const content = editorState.getCurrentContent();
-                const blocks = content.getBlockMap();
-                const text = `${option.description} (will split ${blocks.size} blocks)`;
-                return text;
-              },
               onSelect: ({ editorState }) => {
                 const result = window.draftail.splitState(
                   window.draftail.DraftUtils.resetBlockWithType(