Configurations/unix-Makefile.tmpl: remove assignment of AS and ASFLAGS

We have never used these variables with the Unix Makefile, and there's
no reason for us to change this, so to avoid confusion, we remove them.
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5545)

Configurations/unix-Makefile.tmpl

@@ -240,9 +240,8 @@ TARFILE=        ../$(NAME).tar
 # order to be excused from maintaining a separate set of architecture
 # dependent assembler flags. E.g. if you throw -mcpu=ultrasparc at SPARC
 # gcc, then the driver will automatically translate it to -xarch=v8plus
-# and pass it down to assembler.
-AS={- $config{as} ? "\$(CROSS_COMPILE)$config{as}" : '$(CC) -c' -}
-ASFLAGS={- join(' ', @{$config{asflags}}) || '$(CFLAGS)' -}
+# and pass it down to assembler.  In any case, we do not define AS or
+# ASFLAGS for this reason.
 PERLASM_SCHEME= {- $target{perlasm_scheme} -}
 
 # For x86 assembler: Set PROCESSOR to 386 if you want to support