[source] Revert "opkg: use vfork on gz_open by default (FS#120)"

[LEDE Commits]

jow pushed a commit to source.git, branch master:
https://git.lede-project.org/bba8a1a9ba981d3ddacf88702d079458bd79d08f

commit bba8a1a9ba981d3ddacf88702d079458bd79d08f
Author: Jo-Philipp Wich <jo at mein.io>
AuthorDate: Sun Aug 28 23:01:02 2016 +0200

    Revert "opkg: use vfork on gz_open by default (FS#120)"
    
    This reverts commit 763f5d787316ec1b041450a644ecd9416f11e94f.
    
    Currently the vfork() code path in opkg is broken and relies on unsupported
    ftello() / fseeko() operations on pipes - we need to restructure the code
    before we can reconsider this approach.
    
    Signed-off-by: Jo-Philipp Wich <jo at mein.io>
---
 package/system/opkg/patches/280-use-vfork.patch | 20 --------------------
 1 file changed, 20 deletions(-)

diff --git a/package/system/opkg/patches/280-use-vfork.patch b/package/system/opkg/patches/280-use-vfork.patch
deleted file mode 100644
index 1c46f52..0000000
--- a/package/system/opkg/patches/280-use-vfork.patch
+++ /dev/null
@@ -1,20 +0,0 @@
---- a/libbb/gz_open.c
-+++ b/libbb/gz_open.c
-@@ -29,7 +29,7 @@
- #include <unistd.h>
- #include "libbb.h"
- 
--static int gz_use_vfork;
-+static const int gz_use_vfork = 1;
- 
- FILE *
- gz_open(FILE *compressed_file, int *pid)
-@@ -38,8 +38,6 @@ gz_open(FILE *compressed_file, int *pid)
- 	off_t floc;
- 	int cfile = -1;
- 
--	gz_use_vfork = (getenv("OPKG_USE_VFORK") != NULL);
--
- 	if (gz_use_vfork) {
- 		/* Create a new file descriptor for the input stream
- 		 * (it *must* be associated with a file), and lseek()