How to remove globally a package from Composer?

To remove a globally installed package run:

composer global remove phpunit/phpunit

global command lets you to run many commands like install, require or update as if you were running them from the COMPOSER_HOME directory.

Read the related documentation here: http://getcomposer.org/doc/03-cli.md#global

COMPOSER_HOME depends on your system (on Linux it's ~/.composer), see http://getcomposer.org/doc/03-cli.md#composer-home for more details.

Also you can use another way

cd $HOME/.config/composer

And in composer.json file remove some require positions

After all execute composer update This is a long way, but more clear