Hello Wouter Vanhauwaert,
You could either edit the image recipe or the local.conf file of your build directory to add or remove packages as required. The limitation here would be how the packages are distributed.
You can find the packages and dependencies of the image on the image recipe. Additionally, you can see the packages available on the BSP by running:
$ bitbake -s
In order to prevent that it gets included on the image you may add on the conf/local.conf file:
IMAGE_INSTALL_remove += "package_name"
Please note that since Yocto is not meant for development it does not keep track of changes on the compiled files. If you remove a package your safest bet would be performing a clean and then baking the image again, so to make sure that the images is being built from scratch.
I hope this helps!
Regards,
