Misc service_manager and service test cleanup

services/service_manager/background/BUILD.gn

Index: services/service_manager/background/BUILD.gn
diff --git a/services/service_manager/background/BUILD.gn b/services/service_manager/background/BUILD.gn
index 8e734e6d8b4c1d7da890357e52739daed1ed82e3..156dc476c3aca86b7be952570798f76558a54b4c 100644
--- a/services/service_manager/background/BUILD.gn
+++ b/services/service_manager/background/BUILD.gn
@@ -6,7 +6,6 @@ group("background") {
   testonly = true
   deps = [
     ":lib",
-    ":main",
   ]
 }
 
@@ -25,19 +24,3 @@ source_set("lib") {
     "//services/service_manager/standalone",
   ]
 }
-
-source_set("main") {
-  sources = [
-    "background_service_manager_main.cc",
-    "background_service_manager_main.h",
-  ]
-  deps = [
-    "//base",
-    "//services/service_manager",
-    "//services/service_manager/public/cpp:sources",
-    "//services/service_manager/runner:init",
-    "//services/service_manager/runner/common",
-    "//services/service_manager/runner/host:lib",
-    "//services/service_manager/standalone",
-  ]
-}