atof(2) and friends do not set errstr.

Reference: /n/sources/patch/applied/atofnowerrstr
Date: Fri May 14 16:52:54 CES 2010
Signed-off-by: quanstro@quanstro.net

--- /sys/man/2/atof	Fri May 14 16:52:23 2010
+++ /sys/man/2/atof	Fri May 14 16:52:22 2010
@@ -135,9 +135,6 @@
 interpretable as a number; even in this case,
 .I rptr
 will be updated.
-.br
-These routines set
-.IR errstr .
 .SH BUGS
 .I Atoi,
 .I atol,