Remove ECMA_LEXICAL_ENVIRONMENT_OBJECT_BOUND. (#2408)

Only the global object bound to the root node of the lexical environment
tree does not have a provideThis flag, and ecma_op_implicit_this_value()
falls back to the global object. Hence we get the same effect regardless
of provideThis.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

jerry-core/vm/vm.c

@@ -2300,9 +2300,7 @@ vm_loop (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
 
           object_p = ecma_get_object_from_value (result);
 
-          with_env_p = ecma_create_object_lex_env (frame_ctx_p->lex_env_p,
-                                                   object_p,
-                                                   true);
+          with_env_p = ecma_create_object_lex_env (frame_ctx_p->lex_env_p, object_p);
 
           ecma_deref_object (object_p);