Revert "run jest-codemods on .spec.js files, move generator-exercises back in"

This reverts commit 7a001e0fdb.

generator-exercise/generators/app/index.js

@@ -1,41 +0,0 @@
-'use strict';
-const Generator = require('yeoman-generator');
-const chalk = require('chalk');
-const yosay = require('yosay');
-
-module.exports = class extends Generator {
-  prompting() {
-    // Have Yeoman greet the user.
-    this.log(chalk.red('Let\'s do this'));
-
-    const prompts = [{
-      type: 'input',
-      name: 'title',
-      message: 'Enter the exercise title',
-      default: 'title'
-    }];
-
-    return this.prompt(prompts).then(props => {
-      // To access props later use this.props.someAnswer;
-      this.props = props;
-    });
-  }
-
-  writing() {
-    this.fs.copyTpl(
-      this.templatePath(`title.js`),
-      this.destinationPath(`${this.props.title}.js`),
-      {title: this.props.title}
-    );
-    this.fs.copyTpl(
-      this.templatePath(`title.spec.js`),
-      this.destinationPath(`${this.props.title}.spec.js`),
-      {title: this.props.title}
-    );
-    this.fs.copyTpl(
-      this.templatePath(`README.md`),
-      this.destinationPath(`README.md`),
-      {title: this.props.title}
-    );
-  }
-};

generator-exercise/generators/app/templates/README.md

@@ -1,2 +0,0 @@
-# Exercise XX - <%= title %>
-

generator-exercise/generators/app/templates/dummyfile.txt

@@ -1 +0,0 @@
-<%= title %>

generator-exercise/generators/app/templates/title.js

@@ -1,5 +0,0 @@
-let <%= title %> = function() {
-
-}
-
-module.exports = <%= title %>

generator-exercise/generators/app/templates/title.spec.js

@@ -1,8 +0,0 @@
-let <%= title %> = require('./<%=title%>')
-
-describe('<%=title%>', function() {
-  it('EDITME', function() {
-    expect(<%=title%>()).toEqual(' ');
-  });
-
-});