Remove unused Breadcrumb component [MAILPOET-2433]

assets/css/src/components-editor/components/_heading.scss

@@ -14,18 +14,6 @@
   font-size: 23px;
 }
 
-.mailpoet_breadcrumbs {
-  float: left;
-  font-size: .9em;
-  margin-bottom: 13px;
-  margin-left: 17px;
-  text-transform: uppercase;
-
-  p {
-    margin: 0;
-  }
-}
-
 #mailpoet_heading_email_type {
   width: 200px;
 }

assets/css/src/components-plugin/_breadcrumb.scss

@@ -1,18 +0,0 @@
-.mailpoet_breadcrumb {
-  color: $color-text;
-  font-size: .9em;
-  text-transform: uppercase;
-}
-
-.mailpoet_breadcrumb .mailpoet_current {
-  font-weight: bold;
-}
-
-.mailpoet_breadcrumb a {
-  color: $color-text;
-  text-decoration: none;
-}
-
-.mailpoet_breadcrumb a:hover {
-  color: $color-text-hover;
-}

assets/css/src/mailpoet-plugin.scss

@@ -63,7 +63,6 @@
 @import 'components-plugin/listing';
 @import 'components-plugin/listing-forms';
 @import 'components-plugin/listing-newsletters';
-@import 'components-plugin/breadcrumb';
 @import 'components-plugin/forms';
 @import 'components-plugin/settings';
 @import 'components-plugin/progress-bar';

assets/js/src/newsletters/breadcrumb.jsx

@@ -1,67 +0,0 @@
-import React from 'react';
-import classNames from 'classnames';
-import PropTypes from 'prop-types';
-import MailPoet from 'mailpoet';
-
-class Breadcrumb extends React.Component {
-  constructor(props) {
-    super(props);
-    const steps = props.steps || [
-      {
-        name: 'type',
-        label: MailPoet.I18n.t('selectType'),
-      },
-      {
-        name: 'template',
-        label: MailPoet.I18n.t('template'),
-      },
-      {
-        name: 'editor',
-        label: MailPoet.I18n.t('designer'),
-      },
-      {
-        name: 'send',
-        label: MailPoet.I18n.t('send'),
-      },
-    ];
-
-    this.state = {
-      steps,
-    };
-  }
-
-  render() {
-    const steps = this.state.steps.map((step, index) => {
-      const stepClasses = classNames(
-        { mailpoet_current: (this.props.step === step.name) }
-      );
-
-      return (
-        <span key={`step-${step.label}`}>
-          <span className={stepClasses}>
-            { step.label }
-          </span>
-          { (index < (this.state.steps.length - 1)) ? ' > ' : '' }
-        </span>
-      );
-    });
-
-    return (
-      <p className="mailpoet_breadcrumb">
-        { steps }
-      </p>
-    );
-  }
-}
-
-Breadcrumb.propTypes = {
-  steps: PropTypes.arrayOf(PropTypes.object),
-  step: PropTypes.string,
-};
-
-Breadcrumb.defaultProps = {
-  steps: undefined,
-  step: null,
-};
-
-export default Breadcrumb;