remove not required function and rename the function, const variable.

remove not required function and rename the function, const variable.

this patch included
remove not required initialize value and function.
const variables change to define.
all structs move to NSStructs.h file.

Change-Id: Iff87028d731803d75cd4a20ac49e1e361073c323
Signed-off-by: jaesick.shin <jaesick.shin@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/8383
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Uze Choi <uzchoi@samsung.com>
Tested-by: Uze Choi <uzchoi@samsung.com>