VM: remove service_object_patch.dart and all associated code.

tests/standalone/standalone.status

Index: tests/standalone/standalone.status
diff --git a/tests/standalone/standalone.status b/tests/standalone/standalone.status
index f286a50864f43fe61ebd796fecb6a4c2060a4b59..bb7b57c198b0cf45e85ad789ccf679ab9c0e6632 100644
--- a/tests/standalone/standalone.status
+++ b/tests/standalone/standalone.status
@@ -30,7 +30,6 @@ env_test: Skip # This is testing a vm command line parsing scenario.
 
 [ $runtime == vm || $runtime == dart_precompiled ]
 package/package_isolate_test: Fail # Issue 12474
-io/observatory_test: Fail
 package/scenarios/invalid/same_package_twice_test: Pass # Issue 24119
 # This test checks that the test runner correctly detects and reports non-utf8
 # output from a test.
@@ -159,7 +158,6 @@ medium_integer_test: Pass # The test only fails at runtime, not at compilation.
 oom_error_stacktrace_test: Pass # The test only fails at runtime.
 
 [ $compiler == dart2js && $fast_startup ]
-io/observatory_test: Fail # mirrors not supported.
 io/skipping_dart2js_compilations_test: CompileTimeError # Imports dart:mirrors
 io/test_harness_analyzer_test: CompileTimeError # Imports dart:mirrors
 io/test_runner_test: CompileTimeError # Imports dart:mirrors