Really avoid compiler warning about unused vars

Source/CPack/cmCPackDocumentMacros.cxx

@@ -1,10 +1,8 @@
 #include "cmCPackDocumentMacros.h"
 
 void cmCPackDocumentMacros::GetMacrosDocumentation(
-        std::vector<cmDocumentationEntry>& v)
+        std::vector<cmDocumentationEntry>& )
 {
-   // avoid compiler warning
-   (int)v.size();
    // Commented-out example of use
    //
    //    cmDocumentationEntry e("cpack_<macro>",

Source/CPack/cmCPackDocumentVariables.cxx

@@ -1,10 +1,8 @@
 #include "cmCPackDocumentVariables.h"
 #include "cmake.h"
 
-void cmCPackDocumentVariables::DefineVariables(cmake* cm)
+void cmCPackDocumentVariables::DefineVariables(cmake* )
 {
-  // avoid compiler warning
-  (void*)cm;
   // Subsection: variables defined/used by cpack,
   // which are common to all CPack generators