docs: remove the AUTHOR section, per advice from 'man man-pages'

Also because most of nano has meanwhile been written by other people
than Chris.  And because authorship is meta-information, irrelevant
for knowing how to operate nano.

doc/nano.1

@@ -358,8 +358,3 @@ the environment variable \fBNANO_NOCATCH\fR.
 .BR nanorc (5)
 .PP
 \fI/usr/share/doc/nano/\fP (or equivalent on your system)
-
-.SH AUTHOR
-Chris Allegretta and others (see the files \fIAUTHORS\fR and
-\fITHANKS\fP for details).  This manual page was originally written by
-Jordi Mallach for the Debian system (but may be used by others).

doc/nanorc.5

@@ -881,8 +881,3 @@ Per-user configuration file.
 
 .SH SEE ALSO
 .BR nano (1)
-
-.SH AUTHOR
-Chris Allegretta and others (see the files \fIAUTHORS\fP and
-\fITHANKS\fP for details).  This manual page was originally written by
-Jordi Mallach for the Debian system (but may be used by others).

doc/rnano.1

@@ -58,8 +58,3 @@ Please report bugs via
 
 .SH SEE ALSO
 .BR nano (1)
-
-.SH AUTHOR
-Chris Allegretta and others (see the files \fIAUTHORS\fR and \fITHANKS\fR
-for details).  This manual page was originally written by Thijs Kinkhorst
-for the Debian system (but may be used by others).