Remove unused

- edac_pci_ctl_info::edac_subsys
- edac_pci_ctl_info::complete
- edac_device_ctl_info::removal_complete

members.

Found by https://github.com/jirislaby/clang-struct.

  [ bp: Squash three almost identical trivial patches into one. ]
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20240213112051.27715-6-jirislaby@kernel.orgSigned-off-by: Borislav Petkov (AMD) <bp@alien8.de>