Issue #3344794: Remove the committed vendor directory

vendor/autoload.php

vendor/composer/ClassLoader.php

vendor/composer/LICENSE

vendor/composer/autoload_classmap.php

vendor/composer/autoload_namespaces.php

vendor/composer/autoload_psr4.php

vendor/composer/autoload_real.php

vendor/composer/autoload_static.php

vendor/composer/installed.json

vendor/pclzip/pclzip/composer.json

vendor/pclzip/pclzip/gnu-lgpl.txt

vendor/pclzip/pclzip/pclzip.lib.php

vendor/pclzip/pclzip/readme.txt

vendor/phpoffice/common/.gitignore

vendor/phpoffice/common/.scrutinizer.yml

vendor/phpoffice/common/.travis.yml

vendor/phpoffice/common/.travis_shell_after_success.sh

vendor/phpoffice/common/CHANGELOG.md

vendor/phpoffice/common/COPYING

vendor/phpoffice/common/COPYING.LESSER