oem-ibm: requester: dbus_to_file_handler: Drop unused mctp_fd

```
../oem/ibm/requester/dbus_to_file_handler.hpp:83:9: error: private field 'mctp_fd' is not used [-Werror,-Wunused-private-field]
   83 |     int mctp_fd;
      |         ^
```

Change-Id: I03751463e91b5f62c1e60c1ef47c22dcfcc20215
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
diff --git a/oem/ibm/requester/dbus_to_file_handler.cpp b/oem/ibm/requester/dbus_to_file_handler.cpp
index b90690e..26d3e32 100644
--- a/oem/ibm/requester/dbus_to_file_handler.cpp
+++ b/oem/ibm/requester/dbus_to_file_handler.cpp
@@ -23,12 +23,12 @@
     "xyz.openbmc_project.Common.Progress.OperationStatus.Failed";
 
 DbusToFileHandler::DbusToFileHandler(
-    int mctp_fd, uint8_t mctp_eid, pldm::InstanceIdDb* instanceIdDb,
+    int /* mctp_fd */, uint8_t mctp_eid, pldm::InstanceIdDb* instanceIdDb,
     sdbusplus::message::object_path resDumpCurrentObjPath,
     pldm::requester::Handler<pldm::requester::Request>* handler) :
-    mctp_fd(mctp_fd),
-    mctp_eid(mctp_eid), instanceIdDb(instanceIdDb),
-    resDumpCurrentObjPath(resDumpCurrentObjPath), handler(handler)
+    mctp_eid(mctp_eid),
+    instanceIdDb(instanceIdDb), resDumpCurrentObjPath(resDumpCurrentObjPath),
+    handler(handler)
 {}
 
 void DbusToFileHandler::sendNewFileAvailableCmd(uint64_t fileSize)
diff --git a/oem/ibm/requester/dbus_to_file_handler.hpp b/oem/ibm/requester/dbus_to_file_handler.hpp
index dbf3406..3af116d 100644
--- a/oem/ibm/requester/dbus_to_file_handler.hpp
+++ b/oem/ibm/requester/dbus_to_file_handler.hpp
@@ -79,9 +79,6 @@
     /** @brief method to get the acf file contents */
     std::string getAcfFileContent();
 
-    /** @brief fd of MCTP communications socket */
-    int mctp_fd;
-
     /** @brief MCTP EID of host firmware */
     uint8_t mctp_eid;