Remove redundant vconf key insertion for liblazymount

Remove redundant vconf key insertion for liblazymount

platform/core/appfw/vconf-internal-keys/data/vconf-internal-system-keys.xml
already contains the "db/system/lazy_mount_show_ui" key.

<vconfkey type="int32" name="db/system/lazy_mount_show_ui" readPriv="http://tizen.org/privilege/internal/default/platform" writePriv="http://tizen.org/privilege/internal/default/platform">
  <header>VCONFKEY_SYSTEM_LAZY_MOUNT_SHOW_UI</header>
  <val>0</val>
  <creator/>
  <email/>
  <comment><![CDATA[ ]]></comment>
</vconfkey>

Change-Id: I5a22f32afa6f1b3671cfc53ed2f626ce8e9fc88e
Signed-off-by: Hyotaek Shim <hyotaek.shim@samsung.com>