composer 卸载github.com源码包。

列如：

$ composer remove hooklife/thinkphp5-wechat
hooklife/thinkphp5-wechat is not required in your composer.json and has not been removed
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 0 installs, 0 updates, 15 removals
 - Removing hooklife/thinkphp5-wechat (dev-master 23f7b61)
 - Removing overtrue/wechat (3.3.15)
 - Removing pimple/pimple (dev-master)
 - Removing psr/container (dev-master)
 - Removing monolog/monolog (1.x-dev)
 - Removing psr/log (dev-master)
 - Removing guzzlehttp/guzzle (6.3.0)
 - Removing doctrine/cache (1.6.x-dev)
 - Removing guzzlehttp/promises (dev-master)
 - Removing guzzlehttp/psr7 (dev-master)
 - Removing symfony/psr-http-message-bridge (dev-master)
 - Removing psr/http-message (dev-master)
 - Removing symfony/http-foundation (3.4.x-dev eb635ed)
 - Removing symfony/polyfill-mbstring (dev-master)
 - Removing overtrue/socialite (dev-master)
Writing lock file
Generating autoload files