oem-ibm: libpldmresponder: file_io: Remove unused fields

```
../oem/ibm/libpldmresponder/file_io.hpp:418:9: error: private field 'hostSockFd' is not used [-Werror,-Wunused-private-field]
  418 |     int hostSockFd;
      |         ^
../oem/ibm/libpldmresponder/file_io.hpp:419:13: error: private field 'hostEid' is not used [-Werror,-Wunused-private-field]
  419 |     uint8_t hostEid;
      |             ^
../oem/ibm/libpldmresponder/file_io.hpp:420:25: error: private field 'instanceIdDb' is not used [-Werror,-Wunused-private-field]
  420 |     pldm::InstanceIdDb* instanceIdDb;
      |                         ^
../oem/ibm/libpldmresponder/file_io.hpp:433:57: error: private field 'handler' is not used [-Werror,-Wunused-private-field]
  433 |     pldm::requester::Handler<pldm::requester::Request>* handler;
      |
```

Change-Id: Ifd2e813423b7bc0bd67780c0fc21e32cf8de3e85
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
diff --git a/oem/ibm/libpldmresponder/file_io.hpp b/oem/ibm/libpldmresponder/file_io.hpp
index 495cf24..dff0085 100644
--- a/oem/ibm/libpldmresponder/file_io.hpp
+++ b/oem/ibm/libpldmresponder/file_io.hpp
@@ -169,9 +169,7 @@
     Handler(oem_platform::Handler* oemPlatformHandler, int hostSockFd,
             uint8_t hostEid, pldm::InstanceIdDb* instanceIdDb,
             pldm::requester::Handler<pldm::requester::Request>* handler) :
-        oemPlatformHandler(oemPlatformHandler),
-        hostSockFd(hostSockFd), hostEid(hostEid), instanceIdDb(instanceIdDb),
-        handler(handler)
+        oemPlatformHandler(oemPlatformHandler)
     {
         handlers.emplace(
             PLDM_READ_FILE_INTO_MEMORY,
@@ -415,9 +413,6 @@
 
   private:
     oem_platform::Handler* oemPlatformHandler;
-    int hostSockFd;
-    uint8_t hostEid;
-    pldm::InstanceIdDb* instanceIdDb;
     using DBusInterfaceAdded = std::vector<std::pair<
         std::string,
         std::vector<std::pair<std::string, std::variant<std::string>>>>>;
@@ -430,7 +425,6 @@
         vmiCertMatcher;    //!< Pointer to capture the interface added signal
                            //!< for new csr string
     /** @brief PLDM request handler */
-    pldm::requester::Handler<pldm::requester::Request>* handler;
     std::vector<std::unique_ptr<pldm::requester::oem_ibm::DbusToFileHandler>>
         dbusToFileHandlers;
 };