fix various warnings

Fix various warnings emitted by -Werror:

    - Unused parameters.
    - Excess semi-colons.
    - Missing initializer.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ifcdac2a66f9cc5f7d7e6571e139c0abdb1c86a8d
diff --git a/elog_entry.cpp b/elog_entry.cpp
index 9c5d213..8a19d86 100644
--- a/elog_entry.cpp
+++ b/elog_entry.cpp
@@ -64,7 +64,7 @@
     return fd;
 }
 
-void Entry::closeFD(int fd, sdeventplus::source::EventBase& source)
+void Entry::closeFD(int fd, sdeventplus::source::EventBase& /*source*/)
 {
     close(fd);
     fdCloseEventSource.reset();