bmc: drop unused phosphor-logging header

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: Ib4cf0e64f0107344e65ca8fa449b244f0574ea1d
diff --git a/bmc/firmware_handler.cpp b/bmc/firmware_handler.cpp
index ffe40b1..7d896d1 100644
--- a/bmc/firmware_handler.cpp
+++ b/bmc/firmware_handler.cpp
@@ -23,7 +23,6 @@
 #include "util.hpp"
 
 #include <blobs-ipmid/blobs.hpp>
-#include <phosphor-logging/log.hpp>
 
 #include <algorithm>
 #include <cstdint>