tools: main: drop unused header

Drop unused blobs manager header.

Change-Id: I1903972462dff4e2aaffe69e8e3806bab0ef98d0
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/main.cpp b/main.cpp
index f8700b1..34c6212 100644
--- a/main.cpp
+++ b/main.cpp
@@ -24,7 +24,6 @@
 #include "lpc_nuvoton.hpp"
 #include "pci_handler.hpp"
 
-#include <blobs-ipmid/manager.hpp>
 #include <cstdint>
 #include <memory>
 #include <phosphor-logging/log.hpp>