Over the years a lot of stuff got left lying around your website installation from Fabrik installs, especially if you updated from Github. With 4.2 we have cleaned all this up so new installs and github updates reduce this to a very limited few files.
Once you have updated to 4.2 you should go through a cleanup process of your site. You can safely remove/delete the following files and directories from your Joomla root path:
fabrik_build/
contibution_license.txt
Gruntfile.js
package.json
README.md
README.txt
software_license.txt
transfix-config-generator.php
.gitignore
.gitmodules
.jshint
In addition, if you are not installing and using the Fabrik Libraries package, you can delete the following folders:
libraries/fabrik/libs
libraries/fabrik/vendor
You should also go through and uninstall all Fabrik plugins and modules that are not showing a version of 4.2. All of these are unsupported at this time.
Once you have updated to 4.2 you should go through a cleanup process of your site. You can safely remove/delete the following files and directories from your Joomla root path:
fabrik_build/
contibution_license.txt
Gruntfile.js
package.json
README.md
README.txt
software_license.txt
transfix-config-generator.php
.gitignore
.gitmodules
.jshint
In addition, if you are not installing and using the Fabrik Libraries package, you can delete the following folders:
libraries/fabrik/libs
libraries/fabrik/vendor
You should also go through and uninstall all Fabrik plugins and modules that are not showing a version of 4.2. All of these are unsupported at this time.