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add_filter( 'the_content', 'tgm_io_shortcode_empty_paragraph_fix' );
/**
 * Filters the content to remove any extra paragraph or break tags
 * caused by shortcodes.
 *
 * @since 1.0.0
 *
 * @param string $content  String of HTML content.
 * @return string $content Amended string of HTML content.
 */
function tgm_io_shortcode_empty_paragraph_fix( $content ) {
 
    $array = array(
        '<p>['      => '[',
        ']</p>'   => ']',
        ']<br />' => ']'
    );
    return strtr( $content, $array );
 
}