intern.h: stale declarations

* include/ruby/intern.h: remove stale declarations, which were
  removed because of ripper.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50178 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

include/ruby/intern.h

@@ -618,8 +618,6 @@ VALUE rb_Hash(VALUE);
 double rb_cstr_to_dbl(const char*, int);
 double rb_str_to_dbl(VALUE, int);
 /* parse.y */
-RUBY_EXTERN int   ruby_sourceline;
-RUBY_EXTERN char *ruby_sourcefile;
 ID rb_id_attrset(ID);
 int rb_is_const_id(ID);
 int rb_is_global_id(ID);