Reverting PWA install prompt

This protocol changed from when the old React implementation was built
and it doesn't work from a user-experience perspective now

src/components/InstallPrompt/__snapshots__/test.js.snap

@@ -1,28 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`InstallPrompt rendering 1`] = `
-<div
-  className="install"
->
-  <p
-    className="cta"
-  >
-    Add Regexper to your home screen?
-  </p>
-  <div
-    className="actions"
-  >
-    <button
-      className="primary"
-      onClick={[MockFunction]}
-    >
-      Add It
-    </button>
-    <button
-      onClick={[MockFunction]}
-    >
-      No Thanks
-    </button>
-  </div>
-</div>
-`;

src/components/InstallPrompt/index.js

@@ -1,21 +0,0 @@
-import React from 'react';
-import PropTypes from 'prop-types';
-
-import style from './style.module.css';
-
-const InstallPrompt = ({ onAccept, onReject }) => (
-  <div className={ style.install }>
-    <p className={ style.cta }>Add Regexper to your home screen?</p>
-    <div className={ style.actions }>
-      <button className={ style.primary } onClick={ onAccept }>Add It</button>
-      <button onClick={ onReject }>No Thanks</button>
-    </div>
-  </div>
-);
-
-InstallPrompt.propTypes = {
-  onAccept: PropTypes.func.isRequired,
-  onReject: PropTypes.func.isRequired
-};
-
-export default InstallPrompt;

src/components/InstallPrompt/style.module.css

@@ -1,38 +0,0 @@
-@import url('../../globals.module.css');
-
-.install {
-  position: fixed;
-  bottom: 0;
-  left: 0;
-  right: 0;
-  background: var(--color-tan);
-  color: var(--color-black);
-}
-
-.cta {
-  margin: 0;
-  padding: var(--spacing-margin);
-  text-align: center;
-}
-
-.actions {
-  display: flex;
-  flex-wrap: nowrap;
-  justify-content: space-evenly;
-  padding: var(--spacing-margin);
-
-  & button {
-    font-size: inherit;
-    line-height: 2.8rem;
-    border: 0 none;
-    background: var(--control-gradient);
-    color: var(--color-black);
-    cursor: pointer;
-    padding: 0;
-    width: 40vw;
-
-    &.primary {
-      font-weight: bold;
-    }
-  }
-}

src/components/InstallPrompt/test.js

@@ -1,13 +0,0 @@
-import React from 'react';
-import { shallow } from 'enzyme';
-
-import InstallPrompt from 'components/InstallPrompt';
-
-describe('InstallPrompt', () => {
-  test('rendering', () => {
-    const component = shallow(
-      <InstallPrompt onReject={ jest.fn() } onAccept={ jest.fn() } />
-    );
-    expect(component).toMatchSnapshot();
-  });
-});