platform-mc: terminus_manager: Remove unused 'event' field

```
In file included from ../platform-mc/terminus_manager.cpp:1:
../platform-mc/terminus_manager.hpp:211:25: error: private field 'event' is not used [-Werror,-Wunused-private-field]
  211 |     sdeventplus::Event& event;
      |                         ^
```

Change-Id: Ibcad959ae4c0272aa2f923ca8c5fa3ee292b06e2
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
diff --git a/platform-mc/terminus_manager.hpp b/platform-mc/terminus_manager.hpp
index 2816fb7..42045b8 100644
--- a/platform-mc/terminus_manager.hpp
+++ b/platform-mc/terminus_manager.hpp
@@ -51,12 +51,12 @@
     TerminusManager& operator=(TerminusManager&&) = delete;
     virtual ~TerminusManager() = default;
 
-    explicit TerminusManager(sdeventplus::Event& event,
+    explicit TerminusManager(sdeventplus::Event& /* event */,
                              RequesterHandler& handler,
                              pldm::InstanceIdDb& instanceIdDb,
                              TerminiMapper& termini, Manager* manager) :
-        event(event),
-        handler(handler), instanceIdDb(instanceIdDb), termini(termini),
+        handler(handler),
+        instanceIdDb(instanceIdDb), termini(termini),
         tidPool(tidPoolSize, false), manager(manager)
     {
         // DSP0240 v1.1.0 table-8, special value: 0,0xFF = reserved
@@ -206,10 +206,6 @@
     exec::task<int> getPLDMCommands(pldm_tid_t tid, uint8_t type,
                                     bitfield8_t* supportedCmds);
 
-    /** @brief Reference to to PLDM daemon's main event loop.
-     */
-    sdeventplus::Event& event;
-
     /** @brief Reference to a Handler object that manages the request/response
      *         logic.
      */