pxz: drop no longer required patch

pkgs/tools/compression/pxz/_SC_ARG_MAX.patch

@@ -1,36 +0,0 @@
-From b8f9827fc4de9296c7a6f5e6fdac46e070cd6cb4 Mon Sep 17 00:00:00 2001
-From: Igor Pashev <pashev.igor@gmail.com>
-Date: Sat, 1 Nov 2014 18:10:05 +0300
-Subject: [PATCH] Fixed crash on Linux when stack size is unlimited
-
----
- pxz.c | 7 +++++--
- 1 file changed, 5 insertions(+), 2 deletions(-)
-
-diff --git a/pxz.c b/pxz.c
-index 9cb843e..52713e2 100644
---- a/pxz.c
-+++ b/pxz.c
-@@ -65,7 +65,7 @@ FILE **ftemp;
- char str[0x100];
- char buf[BUFFSIZE];
- char *xzcmd;
--size_t xzcmd_max;
-+const size_t xzcmd_max = 10240;
- 
- unsigned opt_complevel = 6, opt_stdout, opt_keep, opt_threads, opt_verbose;
- unsigned opt_force, opt_stdout;
-@@ -243,9 +243,12 @@ int main( int argc, char **argv ) {
- 	lzma_filter filters[LZMA_FILTERS_MAX + 1];
- 	lzma_options_lzma lzma_options;
- 	
--	xzcmd_max = sysconf(_SC_ARG_MAX);
- 	page_size = sysconf(_SC_PAGE_SIZE);
- 	xzcmd = malloc(xzcmd_max);
-+	if (!xzcmd) {
-+		fprintf(stderr, "Failed to allocate %lu bytes for xz command.\n", xzcmd_max);
-+		return -1;
-+	}
- 	snprintf(xzcmd, xzcmd_max, XZ_BINARY);
- 	
- 	parse_args(argc, argv);

pkgs/tools/compression/pxz/default.nix

@@ -13,8 +13,6 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ xz ];
 
-  patches = [ ./_SC_ARG_MAX.patch ];
-
   buildPhase = ''
     gcc -o pxz pxz.c -llzma \
         -fopenmp -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -O2 \