package/bash: drop SHOBJ_STATUS from BASH_CONF_ENV

package/bash: drop SHOBJ_STATUS from BASH_CONF_ENV

SHOBJ_STATUS=unsupported was added in commit
4a2af11cba83ef176672609dd7321712fa7f6a28 to work around a limitation
of the configure script that forgot to set this variable in
static-linking configurations.

It turns out that this issue has been fixed upstream as of bash 5.0:

  https://git.savannah.gnu.org/cgit/bash.git/diff/configure.ac?id=d233b485e83c3a784b803fb894280773f16f2deb

  (see hunk @@ -1151,6 +1179,9 @@)

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>