diff --git a/gawk-3.1.3-getpgrp_void.patch b/gawk-3.1.3-getpgrp_void.patch
deleted file mode 100644
index 50a48f3..0000000
--- a/gawk-3.1.3-getpgrp_void.patch
+++ /dev/null
@@ -1,45 +0,0 @@
---- gawk-3.1.3/main.c.getpgrp_void	2004-01-26 12:08:26.000000000 +0100
-+++ gawk-3.1.3/main.c	2004-01-26 12:15:22.000000000 +0100
-@@ -874,14 +874,11 @@
- 
- 	PROCINFO_node = install("PROCINFO",
- 			node((NODE *) NULL, Node_var_array, (NODE *) NULL));
--
- #ifdef GETPGRP_VOID
--#define getpgrp_arg() /* nothing */
-+	value = getpgrp();
- #else
--#define getpgrp_arg() getpid()
-+	value = getpgrp(getpid());
- #endif
--
--	value = getpgrp(getpgrp_arg());
- 	aptr = assoc_lookup(PROCINFO_node, tmp_string("pgrpid", 6), FALSE);
- 	*aptr = make_number(value);
- 
---- gawk-3.1.3/io.c.getpgrp_void	2004-01-26 12:08:36.000000000 +0100
-+++ gawk-3.1.3/io.c	2004-01-26 12:16:04.000000000 +0100
-@@ -1422,11 +1422,6 @@
- 	return 0;
- }
- 
--#ifdef GETPGRP_VOID
--#define getpgrp_arg() /* nothing */
--#else
--#define getpgrp_arg() getpid()
--#endif
- 
- /* pidopen --- "open" /dev/pid, /dev/ppid, and /dev/pgrpid */
- 
-@@ -1440,7 +1435,11 @@
- 	warning(_("use `PROCINFO[\"%s\"]' instead of `%s'"), cp, name);
- 
- 	if (name[6] == 'g')
-+#ifdef GETPGRP_VOID
-+		sprintf(tbuf, "%d\n", (int) getpgrp());
-+#else
- 		sprintf(tbuf, "%d\n", (int) getpgrp(getpgrp_arg()));
-+#endif
- 	else if (name[6] == 'i')
- 		sprintf(tbuf, "%d\n", (int) getpid());
- 	else