Nuked Oga::XML::Lexer#html

This method was rather pointless since there's already a "html?" method.

ext/java/org/liboga/xml/Lexer.rl

@@ -89,7 +89,7 @@ public class Lexer extends RubyObject
     @JRubyMethod
     public IRubyObject advance_native(ThreadContext context, RubyString rb_str)
     {
-        Boolean html_p = this.callMethod(context, "html").isTrue();
+        Boolean html_p = this.callMethod(context, "html?").isTrue();
 
         Encoding encoding = rb_str.getEncoding();