Delete unused permalink component

app/javascript/mastodon/components/permalink.js

@@ -1,40 +0,0 @@
-import React from 'react';
-import PropTypes from 'prop-types';
-
-export default class Permalink extends React.PureComponent {
-
-  static contextTypes = {
-    router: PropTypes.object,
-  };
-
-  static propTypes = {
-    className: PropTypes.string,
-    href: PropTypes.string.isRequired,
-    to: PropTypes.string.isRequired,
-    children: PropTypes.node,
-    onInterceptClick: PropTypes.func,
-  };
-
-  handleClick = e => {
-    if (this.props.onInterceptClick && this.props.onInterceptClick()) {
-      e.preventDefault();
-      return;
-    }
-
-    if (this.context.router && e.button === 0 && !(e.ctrlKey || e.metaKey)) {
-      e.preventDefault();
-      this.context.router.history.push(this.props.to);
-    }
-  }
-
-  render () {
-    const { href, children, className, onInterceptClick, ...other } = this.props;
-
-    return (
-      <a target='_blank' href={href} onClick={this.handleClick} {...other} className={`permalink${className ? ' ' + className : ''}`}>
-        {children}
-      </a>
-    );
-  }
-
-}