Removed duplicate imports of prop-types

• Removed:
- duplicate imports of prop-types

app/javascript/gabsocial/components/modal/block_account_modal.js

@@ -1,7 +1,6 @@
 import React from 'react'
 import PropTypes from 'prop-types'
 import { connect } from 'react-redux'
-import PropTypes from 'prop-types'
 import { injectIntl, defineMessages } from 'react-intl'
 import { makeGetAccount } from '../../selectors'
 import { blockAccount } from '../../actions/accounts'

app/javascript/gabsocial/components/sidebar_xs.js

@@ -1,6 +1,5 @@
 import React from 'react'
 import PropTypes from 'prop-types'
-import PropTypes from 'prop-types'
 import { connect } from 'react-redux'
 import { Link, NavLink } from 'react-router-dom'
 import ImmutablePropTypes from 'react-immutable-proptypes'

app/javascript/gabsocial/containers/media_container.js

@@ -1,5 +1,4 @@
 import React from 'react'
-import PropTypes from 'prop-types';
 import ReactDOM from 'react-dom';
 import PropTypes from 'prop-types';
 import { IntlProvider, addLocaleData } from 'react-intl';