Remove support for legacy const, part 1

test/mjsunit/declare-locally.js

Index: test/mjsunit/declare-locally.js
diff --git a/test/mjsunit/declare-locally.js b/test/mjsunit/declare-locally.js
index 45d30e09476b4993a2124c57b2cadfa1190f8ed0..f03217e739a1448d2ba83fe624a97ea9a6d6fb45 100644
--- a/test/mjsunit/declare-locally.js
+++ b/test/mjsunit/declare-locally.js
@@ -27,19 +27,13 @@
 
 // Make sure that we're not overwriting global
 // properties defined in the prototype chain too
-// early when shadowing them with var/const
+// early when shadowing them with var
 // declarations.
 
 // This exercises the code in runtime.cc in
 // DeclareGlobal...Locally().
 
-// Flags: --legacy-const
-
 this.__proto__.foo = 42;
-this.__proto__.bar = 87;
 
 eval("assertEquals(undefined, foo); var foo = 87;");
 assertEquals(87, foo);
-
-eval("assertEquals(undefined, bar); const bar = 42;");
-assertEquals(42, bar);