COMP: compilation of Test-QRMatrix (clang, int64)

- remove unused local functions from volumeExprDriver

src/functionObjects/utilities/parProfiling/parProfiling.H

@@ -77,10 +77,10 @@ class parProfiling
 {
     // Private Member Functions
 
-        //- Disallow default bitwise copy construct
+        //- No copy construct
         parProfiling(const parProfiling&) = delete;
 
-        //- Disallow default bitwise assignment
+        //- No copy assignment
         void operator=(const parProfiling&) = delete;