[trac742] Remove outdated comment

src/lib/cc/data.cc

@@ -52,13 +52,6 @@ Element::toWire(std::ostream& ss) const {
     toJSON(ss);
 }
 
-//
-// The following methods are effectively empty, and their parameters are
-// unused.  To silence compilers that warn unused function parameters,
-// we specify a (compiler dependent) special keyword when available.
-// It's defined in config.h, and to avoid including this header file from
-// installed files we define the methods here.
-//
 bool
 Element::getValue(long int&) {
     return (false);