Fedora does not maintain any code related to legacy BIOS booting.
That is done by the maintainers of the bootloader packages.
What Fedora presumably intends is to remove all bootloader packages from the installation image.
In that case, the Linux kernel can be booted only by using its included EFI stub.
One less package in the installation image might be claimed to imply less maintenance work for Fedora, but in any case such maintenance work has nothing to do with the work done for maintaining legacy code.
That is done by the maintainers of the bootloader packages.
What Fedora presumably intends is to remove all bootloader packages from the installation image.
In that case, the Linux kernel can be booted only by using its included EFI stub.
One less package in the installation image might be claimed to imply less maintenance work for Fedora, but in any case such maintenance work has nothing to do with the work done for maintaining legacy code.