Revert "Update mojo sdk to rev 8d45c89c30b230843c5bd6dd0693a555750946c0"

third_party/mojo/src/mojo/edk/system/BUILD.gn

Index: third_party/mojo/src/mojo/edk/system/BUILD.gn
diff --git a/third_party/mojo/src/mojo/edk/system/BUILD.gn b/third_party/mojo/src/mojo/edk/system/BUILD.gn
index d9dc9302c8b0e69dd61ad5cc22a838c75eea89db..12fa225a8ef4db247692b73d10c91b84b5f391a5 100644
--- a/third_party/mojo/src/mojo/edk/system/BUILD.gn
+++ b/third_party/mojo/src/mojo/edk/system/BUILD.gn
@@ -123,14 +123,6 @@ component("system") {
   allow_circular_includes_from = [ "../embedder" ]
 }
 
-group("tests") {
-  testonly = true
-  deps = [
-    ":mojo_system_unittests",
-    ":mojo_message_pipe_perftests",
-  ]
-}
-
 mojo_edk_source_set("test_utils") {
   testonly = true
 
@@ -145,6 +137,7 @@ mojo_edk_source_set("test_utils") {
   ]
 }
 
+# GYP version: mojo/edk/mojo_edk.gyp:mojo_system_unittests
 test("mojo_system_unittests") {
   sources = [
     "../test/multiprocess_test_helper_unittest.cc",
@@ -191,6 +184,7 @@ test("mojo_system_unittests") {
   allow_circular_includes_from = [ "../embedder:embedder_unittests" ]
 }
 
+# GYP version: mojo/edk/mojo_edk.gyp:mojo_message_pipe_perftests
 test("mojo_message_pipe_perftests") {
   sources = [
     "message_pipe_perftest.cc",