Clean out some IRIX cruft

* etc/MACHINES: Remove obsolete discussion of IRIX.
* src/process.c (allocate_pty) [__sgi]: Remove SGI-specific code.
(create_process) [HAVE_PTYS]: Don't worry about IRIX.
* src/syntax.c (scan_sexps_forward): Remove obsolete comment.
* src/unexelf.c [__sgi]: Don't include <syms.h>.
(unexec) [__sgi]: Remove SGI-specific code.

1 files changed, 0 insertions, 2 deletions

diff --git a/src/syntax.c b/src/syntax.c
index d463f7e93db..338dd854f22 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -3196,8 +3196,6 @@ do { prev_from = from;				\
           && (c1 = FETCH_CHAR (from_byte),
               syntax = SYNTAX_WITH_FLAGS (c1),
               SYNTAX_FLAGS_COMSTART_SECOND (syntax)))
-        /* Duplicate code to avoid a complex if-expression
-           which causes trouble for the SGI compiler.  */
         {
           /* Record the comment style we have entered so that only
              the comment-end sequence of the same style actually