remove dead code (old method scan method)

Author: ichiriac

src/parser/expr.js

@@ -405,19 +405,6 @@ module.exports = {
       }
     } else if (this.is('SCALAR')) {
       expr = this.read_scalar();
-      // handle dereferencable
-      while(this.token !== this.EOF) {
-        if (this.token === this.tok.T_OBJECT_OPERATOR) {
-          expr = this.recursive_variable_chain_scan(expr, false);
-        } else if (this.token === this.tok.T_CURLY_OPEN || this.token === '[') {
-          expr = this.read_dereferencable(expr);
-        } else if (this.token === '(') {
-          // https://github.com/php/php-src/blob/master/Zend/zend_language_parser.y#L1118
-          expr = this.node('call')(expr, this.read_function_argument_list());
-        } else {
-          return expr;
-        }
-      }
     } else {
       this.error('EXPR');
       this.next();