clang-tidy: Fix unused private field warnings

Resolved -Wunused-private-field warnings flagged by clang-tidy
by eliminating unused private member variables from the class.

Change-Id: I12054e7e32507bf14a3fff0ba2dac4ec4c8f7327
Signed-off-by: Jayanth Othayoth <ojayanth@gmail.com>
diff --git a/strgfnhandler.cpp b/strgfnhandler.cpp
index 984eb4a..b3005ff 100644
--- a/strgfnhandler.cpp
+++ b/strgfnhandler.cpp
@@ -103,8 +103,7 @@
     // We received some bytes. It may be full or partial. Send a valid
     // FRU file to the inventory controller on DBus for the correct number
     sdbusplus::bus_t bus{bus_type};
-    bool bmcOnlyFru = false;
-    validateFRUArea(reqptr->frunum, fruFilename, bus, bmcOnlyFru);
+    validateFRUArea(reqptr->frunum, fruFilename, bus);
 
     return rc;
 }