usr.bin/compress: remove, as it is handled by ncompress

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diff --git a/usr.bin/compress/compress.1 b/usr.bin/compress/compress.1
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-.\"	$NetBSD: compress.1,v 1.16 2017/07/04 06:58:55 wiz Exp $
-.\"
-.\" Copyright (c) 1986, 1990, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" This code is derived from software contributed to Berkeley by
-.\" James A. Woods, derived from original work by Spencer Thomas
-.\" and Joseph Orost.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"     @(#)compress.1	8.2 (Berkeley) 4/18/94
-.\"
-.Dd January 23, 2003
-.Dt COMPRESS 1
-.Os
-.Sh NAME
-.Nm compress ,
-.\".Nm uncompress ,
-.Nm uncompress
-.\".Nm zcat
-.Nd compress and expand data
-.Sh SYNOPSIS
-.Nm
-.Op Fl cdfv
-.Op Fl b Ar bits
-.Op Ar
-.Nm uncompress
-.Op Fl cdfv
-.Op Ar
-.\".Nm zcat
-.\".Op Ar
-.Sh DESCRIPTION
-.Nm
-reduces the size of the named files using adaptive Lempel-Ziv coding.
-Each
-.Ar file
-is renamed to the same name plus the extension
-.Dq .Z .
-As many of the modification time, access time, file flags, file mode,
-user ID, and group ID as allowed by permissions are retained in the
-new file.
-If compression would not reduce the size of a
-.Ar file ,
-the file is ignored.
-.Pp
-.Nm uncompress
-restores the compressed files to their original form, renaming the
-files by deleting the
-.Dq .Z
-extension.
-.\".Pp
-.\".Nm Zcat
-.\"is an alias for
-.\".Dq "uncompress -c" .
-.Pp
-If renaming the files would cause files to be overwritten and the standard
-input device is a terminal, the user is prompted (on the standard error
-output) for confirmation.
-If prompting is not possible or confirmation is not received, the files
-are not overwritten.
-.Pp
-If no files are specified, the standard input is compressed or uncompressed
-to the standard output.
-If either the input and output files are not regular files, the checks for
-reduction in size and file overwriting are not performed, the input file is
-not removed, and the attributes of the input file are not retained.
-.Pp
-The options are as follows:
-.Bl -tag -width Ds
-.It Fl b
-Specify the
-.Ar bits
-code limit (see below).
-.It Fl c
-Compressed or uncompressed output is written to the standard output.
-No files are modified.
-.It Fl d
-Force decompression.
-.It Fl f
-Force compression of
-.Ar file ,
-even if it is not actually reduced in size.
-Additionally, files are overwritten without prompting for confirmation.
-.It Fl v
-Print the percentage reduction of each file.
-.El
-.Pp
-.Nm
-uses a modified Lempel-Ziv algorithm.
-Common substrings in the file are first replaced by 9-bit codes 257 and up.
-When code 512 is reached, the algorithm switches to 10-bit codes and
-continues to use more bits until the
-limit specified by the
-.Fl b
-flag is reached (the default is 16).
-.Ar Bits
-must be between 9 and 16.
-.Pp
-After the
-.Ar bits
-limit is reached,
-.Nm
-periodically checks the compression ratio.
-If it is increasing,
-.Nm
-continues to use the existing code dictionary.
-However, if the compression ratio decreases,
-.Nm
-discards the table of substrings and rebuilds it from scratch.
-This allows the algorithm to adapt to the next "block" of the file.
-.Pp
-The
-.Fl b
-flag is omitted for
-.Ar uncompress
-since the
-.Ar bits
-parameter specified during compression
-is encoded within the output, along with
-a magic number to ensure that neither decompression of random data nor
-recompression of compressed data is attempted.
-.Pp
-The amount of compression obtained depends on the size of the
-input, the number of
-.Ar bits
-per code, and the distribution of common substrings.
-Typically, text such as source code or English is reduced by 50\-60%.
-Compression is generally much better than that achieved by Huffman
-coding (as used in the historical command pack), or adaptive Huffman
-coding (as used in the historical command compact), and takes less
-time to compute.
-.Sh EXIT STATUS
-.Ex -std compress
-.Sh SEE ALSO
-.Xr zcat 1
-.Rs
-.%A Welch, Terry A.
-.%D June, 1984
-.%T "A Technique for High Performance Data Compression"
-.%J "IEEE Computer"
-.%V 17:6
-.%P pp. 8-19
-.Re
-.Sh HISTORY
-The
-.Nm
-command appeared in
-.Bx 4.3 .