Rename JSX files with proper .jsx extension (#23733)

app/javascript/mastodon/components/button.js

@@ -1,57 +0,0 @@
-import React from 'react';
-import PropTypes from 'prop-types';
-import classNames from 'classnames';
-
-export default class Button extends React.PureComponent {
-
-  static propTypes = {
-    text: PropTypes.node,
-    type: PropTypes.string,
-    onClick: PropTypes.func,
-    disabled: PropTypes.bool,
-    block: PropTypes.bool,
-    secondary: PropTypes.bool,
-    className: PropTypes.string,
-    title: PropTypes.string,
-    children: PropTypes.node,
-  };
-
-  static defaultProps = {
-    type: 'button',
-  };
-
-  handleClick = (e) => {
-    if (!this.props.disabled && this.props.onClick) {
-      this.props.onClick(e);
-    }
-  };
-
-  setRef = (c) => {
-    this.node = c;
-  };
-
-  focus() {
-    this.node.focus();
-  }
-
-  render () {
-    const className = classNames('button', this.props.className, {
-      'button-secondary': this.props.secondary,
-      'button--block': this.props.block,
-    });
-
-    return (
-      <button
-        className={className}
-        disabled={this.props.disabled}
-        onClick={this.handleClick}
-        ref={this.setRef}
-        title={this.props.title}
-        type={this.props.type}
-      >
-        {this.props.text || this.props.children}
-      </button>
-    );
-  }
-
-}