Remove the mus_clipboard target and merge it into service_unittests.

services/ui/clipboard/BUILD.gn

Index: services/ui/clipboard/BUILD.gn
diff --git a/services/ui/clipboard/BUILD.gn b/services/ui/clipboard/BUILD.gn
index 00b1fe5fefdc976e32b698e118e67b28aa800703..0eabe3350948112b11c851d8fc780627aff75539 100644
--- a/services/ui/clipboard/BUILD.gn
+++ b/services/ui/clipboard/BUILD.gn
@@ -23,20 +23,13 @@ source_set("lib") {
   ]
 }
 
-group("tests") {
+source_set("tests") {
   testonly = true
-  deps = [
-    ":mus_clipboard_unittests",
-  ]
-}
 
-service_test("mus_clipboard_unittests") {
   sources = [
     "clipboard_unittest.cc",
   ]
 
-  catalog = ":mus_clipboard_unittests_catalog"
-
   deps = [
     "//base",
     "//mojo/common",
@@ -51,12 +44,13 @@ service_test("mus_clipboard_unittests") {
   ]
 }
 
-service_manifest("test_manifest") {
-  name = "mus_clipboard_unittests"
+service_manifest("unittest_manifest") {
+  name = "clipboard_unittests"
   source = "test_manifest.json"
 }
 
-catalog("mus_clipboard_unittests_catalog") {
-  embedded_services = [ ":test_manifest" ]
+catalog("tests_catalog") {
+  testonly = true
+  embedded_services = [ ":unittest_manifest" ]
   standalone_services = [ "//services/ui:manifest" ]
 }