lvm2: housekeeping - remove invalid configure option

- Since lvmetad was removed then the configure option --enable-lvmetad is no longer valid.
   A warning is now shown - configure: WARNING: unrecognized options: --enable-lvmetad

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>

lfs/lvm2

@@ -81,7 +81,6 @@ $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
 			--enable-pkgconfig \
 			--with-udevdir=/lib/udev/rules.d \
 			--with-default-locking-dir=/run/lvm \
-			--enable-lvmetad \
 			--enable-udev_rules \
 			--enable-udev_sync
 	cd $(DIR_APP) && make $(MAKETUNING)