maint: let gnulib provide environ

* bootstrap.conf (gnulib_modules): Add environ.
* src/env.c (environ): Delete declaration.
* src/printenv.c (environ): Likewise.
* src/stdbuf.c (environ): Likewise.
* src/su.c (environ): Likewise.

1 files changed, 0 insertions, 2 deletions

diff --git a/src/env.c b/src/env.c
index b69a29a1b..ee5e6b6ce 100644
--- a/src/env.c
+++ b/src/env.c
@@ -91,8 +91,6 @@
   proper_name ("Richard Mlynarik"), \
   proper_name ("David MacKenzie")
 
-extern char **environ;
-
 static struct option const longopts[] =
 {
   {"ignore-environment", no_argument, NULL, 'i'},