sdevent: Remove in favor of sdeventplus

The sdevent utility was replaced with use of sdeventplus and is no
longer used within any of the fan applications.

sdevent was replaced by sdeventplus over a year ago by commit
1cfc2f11b13412a15f8478cebc35e50e6feb13a2

Tested:
    Built all fan applications

Change-Id: If3adb9ec0f56ed1c7b300ddc0f23546cd327f6b3
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
7 files changed