unused imports: `VmArea`, `get_current_pid`, `processes::TEST_MMAP_ANON_SHARED`, and `schedule_process`

unused import: `AtomicU64`

unused import: `serial_println`

unused import: `serial`

unused import: `spin::lock_api::Mutex`

unused import: `serial_println`

unused imports: `FILESYSTEM`, `FileSystem`, `MMAP_ANON_SIMPLE`, `MmapFlags`, `PCB`, `PROCESS_TABLE`, `ProtFlags`, `REGISTER_VALUES`, `TEST_EXIT_CODE`, `TEST_SIMPLE_PROCESS`, `TEST_SIMPLE_STACK_ACCESS`, `await_on::AwaitProcess`, `current_running_event`, `get_current_pid`, `get_runner_time`, `memory::PAGE_SIZE`, `schedule_kernel`, `sleep`, `sys_mmap`, and `sys_nanosleep_32`

unused import: `cell::OnceCell`

unused import: `limine::request::FramebufferRequest`