cerf.3, cerfc.3, cerfcf.3, cerfcl.3, cerff.3. cerfl.3: Remove cerf(3) and links to it

These functions don't exist in glibc, aren't specified
in C99 or C11 (those standards merely reserve the names
for future use), cause package conflicts for libcerf
(http://apps.jcns.fz-juelich.de/doku/sc/libcerf),
which does provide implementations and man-pages for
these functions, and cause confusion for readers
who (not looking too closely at the page) wonder
where the glibc implementation is. Best to simply
remove this page and its links from man-pages.

Reported-by: Joachim Wuttke <j.wuttke@fz-juelich.de>
See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=764310
and https://bugzilla.kernel.org/show_bug.cgi?id=80541

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man3/cerf.3

@@ -1,42 +0,0 @@
-.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
-.\"
-.\" %%%LICENSE_START(GPL_NOVERSION_ONELINE)
-.\" Distributed under GPL
-.\" %%%LICENSE_END
-.\"
-.TH CERF 3 2014-08-19 "" "Linux Programmer's Manual"
-.SH NAME
-cerf, cerff, cerfl, cerfc, cerfcf, cerfcl \- complex error function
-.SH SYNOPSIS
-.B #include <complex.h>
-.sp
-.BI "double complex cerf(double complex " z );
-.br
-.BI "float complex cerff(float complex " z );
-.br
-.BI "long double complex cerfl(long double complex " z );
-.sp
-.BI "double complex cerfc(double complex " z );
-.br
-.BI "float complex cerfcf(float complex " z );
-.br
-.BI "long double complex cerfcl(long double complex " z );
-.sp
-Link with \fI\-lm\fP.
-.SH DESCRIPTION
-The (unimplemented) function
-.BR cerf ()
-is the complex version of the error function.
-erf(z) = 2/sqrt(pi) * integral from 0 to z of exp(\-t*t) dt.
-The function
-.BR cerfc ()
-is defined as cerfc(z) = 1\-cerf(z).
-.\" must check 1/sqrt(2*pi) ?
-.SH CONFORMING TO
-The function names are reserved for future use in C99.
-.SH AVAILABILITY
-Not yet in glibc, as at version 2.19.
-.\" But reserved in NAMESPACE.
-.SH SEE ALSO
-.BR erf (3),
-.BR complex (7)

man3/cerfc.3

@@ -1 +0,0 @@
-.so man3/cerf.3

man3/cerfcf.3

@@ -1 +0,0 @@
-.so man3/cerf.3

man3/cerfcl.3

@@ -1 +0,0 @@
-.so man3/cerf.3

man3/cerff.3

@@ -1 +0,0 @@
-.so man3/cerf.3

man3/cerfl.3

@@ -1 +0,0 @@
-.so man3/cerf.3