sparc: punt unused syscall.h.2

I can't find any mention of this header actually being used.
Seems to be a really old copy of the common syscall.h.

* Makefile.am (EXTRA_DIST): Remove linux/sparc/syscall.h.2.
* linux/sparc/syscall.h.2: Deleted.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/Makefile.am b/Makefile.am
index fd2a6c3..a828154 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -62,7 +62,7 @@
 	     linux/sparc/signalent.h linux/sparc/signalent1.h \
 	     linux/sparc/syscall.h linux/sparc/syscall1.h \
 	     linux/sparc/syscallent.h linux/sparc/syscallent1.h \
-	     linux/sparc/gen.pl linux/sparc/syscall.h.2 \
+	     linux/sparc/gen.pl \
 	     linux/sparc64/dummy2.h linux/sparc64/errnoent.h \
 	     linux/sparc64/errnoent1.h linux/sparc64/errnoent2.h \
 	     linux/sparc64/ioctlent.h linux/sparc64/ioctlent1.h \