remove_rewrites.php

<?php
function cwws_deactivate() {
// to undo - Holy crap!
	global $wp_rewrite;

	// Remove the 'json' endpoint.
	$old_ends = $wp_rewrite->endpoints;
	$wp_rewrite->endpoints = array();
	foreach ( $old_ends as $_end ) {
		list( $_places, $_name ) = $_end;
		if ( 'json' != $_name )
			$wp_rewrite->endpoints[] = $_end;
	}

	// Remove the CPT rules

	// Remove the Tag
	$position = array_search("%people%", $wp_rewrite->rewritecode);
	unset( $wp_rewrite->rewritecode[$position] );
	unset( $wp_rewrite->rewritereplace[$position] );
	unset( $wp_rewrite->queryreplace[$position] );

	// Remove the archive rules
	unset( $wp_rewrite->extra_rules_top["people/?$"] );
	$feeds = '(' . trim( implode( '|', $wp_rewrite->feeds ) ) . ')';
	unset( $wp_rewrite->extra_rules_top["people/feed/$feeds/?$"] );
	unset( $wp_rewrite->extra_rules_top["people/$feeds/?$"] );
	unset( $wp_rewrite->extra_rules_top["people/{$wp_rewrite->pagination_base}/([0-9]{1,})/?$"] );
	
	$wp_rewrite->flush_rules();
}