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>
(cherry picked from commit 24656c23f9302a032de1d3b6527a221614102636)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/bash/bash.mk

@@ -29,7 +29,6 @@ BASH_CONF_ENV += \
 # The static build needs some trickery
 ifeq ($(BR2_STATIC_LIBS),y)
 BASH_CONF_OPTS += --enable-static-link
-BASH_CONF_ENV += SHOBJ_STATUS=unsupported
 # bash wants to redefine the getenv() function. To check whether this is
 # possible, AC_TRY_RUN is used which is not possible in
 # cross-compilation.