Run dartanalyzer by default.

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 945e1235973389f7f2cbfa955d065ae14da6b673..d23d33e122fd88014173ae83a2278abed504f723 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -24,24 +24,6 @@ group("default") {
   }
 }
 
-# A group which invokes the dart checker on each dart package. This can take
-# multiple seconds per target, so we separate it out from the main building.
-# Eventually, we'd like this to be part of the default dart building, but for
-# now, to participate in checking, please add "{package_name}_analyze" to the
-# list of dependencies below.
-group("dartcheck") {
-  testonly = true
-  deps = [
-    "//examples/dart/console_example:console_example_analyze",
-    "//examples/dart/hello_world/hello:hello_analyze",
-    "//examples/dart/hello_world/world:world_analyze",
-    "//examples/dart/wget:wget_analyze",
-    "//services/dart/test/echo:echo_analyze",
-    "//services/dart/test/pingpong:pingpong_analyze",
-    "//services/dart/test/pingpong_target:pingpong_target_analyze",
-  ]
-}
-
 # Deprecated name for the default build target.
 group("root") {
   testonly = true