zsh: drop gdbm dependency and --disable-gdbm

gdbm support is disabled by default in zsh's configure, so
--disable-gdbm is redundant and gdbm in DEPENDS is unused.

Signed-off-by: Sean Nyekjaer <sean@geanix.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-oe/recipes-shells/zsh/zsh_5.9.2.bb

@@ -8,7 +8,7 @@ SECTION = "base/shell"
 LICENSE = "LicenseRef-zsh"
 LIC_FILES_CHKSUM = "file://LICENCE;md5=1a4c4cda3e8096d2fd483ff2f4514fec"
 
-DEPENDS = "ncurses bison-native libcap libpcre2 gdbm groff-native"
+DEPENDS = "ncurses bison-native libcap libpcre2 groff-native"
 
 SRC_URI = "${SOURCEFORGE_MIRROR}/project/${BPN}/${BPN}/${PV}/${BP}.tar.xz"
 SRC_URI[sha256sum] = "36fa734374b44783582cec09bcd67822e2f992c779ec1624ab5596df078d2f81"
@@ -30,7 +30,6 @@ EXTRA_OECONF = " \
     --with-term-lib='ncursesw ncurses' \
     --enable-cap \
     --enable-multibyte \
-    --disable-gdbm \
     --disable-dynamic \
     zsh_cv_shared_environ=yes \
 "