presence: Remove "config.h" include

The "config.h" include is not used within the JSON config object.

Tested:
    Compiled fan presence with --enable-json

Change-Id: I9eb0dbaa7825b255b3fc550305d46aeb3ba02c63
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
2 files changed