remove a preprocessor for TCP_ADAPTER in RI.

remove a preprocessor for TCP_ADAPTER in RI.

since there is a preprocessor for TCP_ADAPTER in RI.
when user is using a interface file(octype.h)
user application have to add -DTCP_ADAPTER flag in their App.

since CA already check TCP_ADAPTER flag,
it is better to remove this preprocessor in RI.

Change-Id: I8dd2998831d9744e25e68c024b2b3e3fbbbc1633
Signed-off-by: jihwan.seo <jihwan.seo@samsung.com>
Signed-off-by: hyuna0213.jo <hyuna0213.jo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/3349
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Ashok Babu Channa <ashok.channa@samsung.com>
Reviewed-by: Jon A. Cruz <jonc@osg.samsung.com>