Delete the tracing service

services/service_manager/standalone/BUILD.gn

Index: services/service_manager/standalone/BUILD.gn
diff --git a/services/service_manager/standalone/BUILD.gn b/services/service_manager/standalone/BUILD.gn
index 4c8ba4f39ecd11dfbf76649ff76b22e1c6b0a05d..7ec5b5e024a76e1ec25f41e14dfac8abac51eb5e 100644
--- a/services/service_manager/standalone/BUILD.gn
+++ b/services/service_manager/standalone/BUILD.gn
@@ -10,8 +10,6 @@ source_set("standalone") {
   sources = [
     "context.cc",
     "context.h",
-    "tracer.cc",
-    "tracer.h",
   ]
 
   deps = [
@@ -26,8 +24,6 @@ source_set("standalone") {
     "//services/service_manager/public/cpp/standalone_service",
     "//services/service_manager/runner/common",
     "//services/service_manager/runner/host:lib",
-    "//services/tracing/public/cpp",
-    "//services/tracing/public/interfaces",
     "//url",
   ]
 }