Avoid patching in dart2dart.

tests/language/language_dart2js.status

Index: tests/language/language_dart2js.status
diff --git a/tests/language/language_dart2js.status b/tests/language/language_dart2js.status
index ffd34285bcd80541772497c21d00ef845f3ff031..109f2ca5e8e0b9713e3540abc851025f0aa5f61c 100644
--- a/tests/language/language_dart2js.status
+++ b/tests/language/language_dart2js.status
@@ -40,9 +40,6 @@ ref_before_declaration_test/04: MissingCompileTimeError
 ref_before_declaration_test/05: MissingCompileTimeError
 ref_before_declaration_test/06: MissingCompileTimeError
 
-external_test/10: Fail
-external_test/20: Fail
-
 enum_syntax_test/01: Fail # Issue 21648
 
 
@@ -148,7 +145,9 @@ deferred_constant_list_test: RuntimeError # Issue 21293
 const_var_test: CompileTimeError # Issue 12793
 map_literal3_test: CompileTimeError # Issue 12793
 method_override5_test: RuntimeError # Issue 12809
+external_test/10: CompileTimeError # Issue 12887
 external_test/13: CompileTimeError # Issue 12887
+external_test/20: CompileTimeError # Issue 12887
 list_literal4_test: RuntimeError # Issue 12890
 built_in_identifier_test/01: CompileTimeError # Issue 13022
 
@@ -220,7 +219,6 @@ metadata_test: Fail # Issue 12762
 const_evaluation_test/01: Fail # Issue 12762
 const_var_test: CompileTimeError # Issue 12794
 map_literal3_test: Fail # Issue 12794
-external_test/13: Fail # Issue 12888
 built_in_identifier_test/01: Fail # Issue 13022
 method_override4_test: Fail # Issue 12810
 method_override5_test: Fail # Issue 12810
@@ -242,6 +240,14 @@ cha_deopt1_test: skip # Issue 17523
 cha_deopt2_test: skip # Issue 17523
 cha_deopt3_test: skip # Issue 17523
 
+external_test/21: MissingCompileTimeError # Issue 12888
+external_test/24: MissingCompileTimeError # Issue 12888
+
+function_propagation_test: RuntimeError # Issue 21673
+function_subtype_call0_test: RuntimeError # Issue 21673
+function_subtype_call1_test: RuntimeError # Issue 21673
+function_subtype_call2_test: RuntimeError # Issue 21673
+
 [ $compiler == dart2dart && $minified ]
 cyclic_type_test/0*: Fail # Issue 12605.
 cyclic_type2_test: Fail # Issue 12605.