git: refactor: remove large #if 0 dead code blocks

[Matthew Dillon]

commit 5ab6a11ffc31794675533611b7b2c72c55d239af
Author: Abdelkader Boudih <dragonflybsd at seuros.com>
Date:   Mon May 11 00:36:28 2026 +0000

    refactor: remove large #if 0 dead code blocks
    
    Remove 3200+ lines of permanently dead code guarded by #if 0 across
    kernel, drivers, VFS, and userland. Several blocks have author comments
    explicitly requesting removal. Code can be inspected in git history.

Summary of changes:
 sys/bus/u4b/serial/usb_serial.c         | 137 ------
 sys/bus/u4b/usb_dev.c                   | 108 ----
 sys/dev/netif/alc/if_alc.c              | 142 ------
 sys/dev/netif/ix/if_ix.c                | 164 -------
 sys/dev/netif/lnc/lance.c               | 150 ------
 sys/dev/raid/dpt/dpt_scsi.c             | 845 --------------------------------
 sys/dev/sound/unit.c                    | 164 -------
 sys/kern/kern_threads.c                 |  96 ----
 sys/kern/sys_process.c                  | 157 ------
 sys/platform/pc64/x86_64/npx.c          | 173 -------
 sys/platform/vkernel64/x86_64/npx.c     | 172 -------
 sys/vfs/fuse/fuse_io.c                  | 302 ------------
 sys/vfs/hammer/hammer_btree.c           | 227 ---------
 sys/vfs/hammer/hammer_prune.c           | 108 ----
 sys/vfs/hammer2/hammer2_chain.c         |  90 ----
 sys/vm/vm_fault.c                       | 149 ------
 usr.sbin/makefs/hammer2/hammer2_chain.c |  90 ----
 17 files changed, 3274 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/5ab6a11ffc31794675533611b7b2c72c55d239af


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