Remove WITHOUT_BZIP2, WITHOUT_BZIP2_SUPPORT

WITHOUT_BZIP2_SUPPORT only affects a single binary, gzip(1); it doesn't
remove bzip2 support from other bits (e.g., libarchive) and there are
no similar options for gzip, xz or zstd.

WITHOUT_BZIP2 has not done anything at all since it was first added
in 2007.

MFC after:	never
Discussed on:	arch@
Reviewed by:	imp, des, adrian, delphij, emaste
Differential Revision:	https://reviews.freebsd.org/D56148
Sponsored by:		https://www.patreon.com/bsdivy

share/man/man5/src.conf.5

@@ -1,5 +1,5 @@
 .\" DO NOT EDIT-- this file is @generated by tools/build/options/makeman.
-.Dd April 2, 2026
+.Dd April 3, 2026
 .Dt SRC.CONF 5
 .Os
 .Sh NAME
@@ -315,21 +315,6 @@ and related programs.
 Do not build or install
 .Xr bsnmpd 1
 and related libraries and data files.
-.It Va WITHOUT_BZIP2
-Do not build contributed bzip2 software as a part of the base system.
-.Bf -symbolic
-The option has no effect yet.
-.Ef
-When set, these options are also in effect:
-.Pp
-.Bl -inset -compact
-.It Va WITHOUT_BZIP2_SUPPORT
-(unless
-.Va WITH_BZIP2_SUPPORT
-is set explicitly)
-.El
-.It Va WITHOUT_BZIP2_SUPPORT
-Build some programs without optional bzip2 support.
 .It Va WITHOUT_CALENDAR
 Do not build
 .Xr calendar 1 .

share/mk/src.opts.mk

@@ -73,7 +73,6 @@ __DEFAULT_YES_OPTIONS = \
     BOOTPD \
     BSDINSTALL \
     BSNMP \
-    BZIP2 \
     CALENDAR \
     CAROOT \
     CCD \
@@ -246,7 +245,6 @@ __LIBC_MALLOC_DEFAULT=	jemalloc
 .for var in \
     BLACKLIST \
     BLOCKLIST \
-    BZIP2 \
     INET \
     INET6 \
     KERBEROS \

tools/build/options/WITHOUT_BZIP2

@@ -1,4 +0,0 @@
-Do not build contributed bzip2 software as a part of the base system.
-.Bf -symbolic
-The option has no effect yet.
-.Ef

tools/build/options/WITHOUT_BZIP2_SUPPORT

@@ -1 +0,0 @@
-Build some programs without optional bzip2 support.

usr.bin/gzip/Makefile

@@ -5,13 +5,7 @@
 PROG=		gzip
 MAN=		gzip.1 gzexe.1 zdiff.1 zforce.1 zmore.1 znew.1
 
-LIBADD=		z lzma zstd
-
-.if ${MK_BZIP2_SUPPORT} != "no"
-LIBADD+=	bz2
-.else
-CFLAGS+=	-DNO_BZIP2_SUPPORT
-.endif
+LIBADD=		bz2 lzma z zstd
 
 CFLAGS+=	-I${SRCTOP}/sys/contrib/zstd/lib