parsers: gcc warnings when configured with --enable-debugging

[k-takata]

The following two warnings are shown when u-ctags is configured with --enable-debugging:

../parsers/html.c:189:13: warning: ‘dumpToken’ defined but not used [-Wunused-function]
 static void dumpToken (tokenInfo *token, const char *context, const char* extra_context)
             ^

../parsers/jscript.c:2617:13: warning: ‘dumpToken’ defined but not used [-Wunused-function]
 static void dumpToken (const tokenInfo *const token)
             ^

We can comment out these two functions with #if 0 ... #endif or completely remove them to suppress the warnings.
(Not sure which is better.)

[masatake]

People may use the function for print-debuggnig. So wrapping #if 0/#endif may be better.