Remove the mojo_use_application_in_sdk GN variable.

mojo/edk/test/BUILD.gn

Index: mojo/edk/test/BUILD.gn
diff --git a/mojo/edk/test/BUILD.gn b/mojo/edk/test/BUILD.gn
index a52fb1c0caab1dc862ef15edf1020b328a6b0ea2..ca969920c72e324f1a4fdfb6e7390aae6a0e7816 100644
--- a/mojo/edk/test/BUILD.gn
+++ b/mojo/edk/test/BUILD.gn
@@ -3,7 +3,6 @@
 # found in the LICENSE file.
 
 import("../mojo_edk.gni")
-import("../../public/mojo.gni")
 import("//testing/test.gni")
 
 mojo_edk_source_set("test_support") {
@@ -97,6 +96,7 @@ mojo_edk_source_set("test_support_impl") {
 group("public_tests") {
   testonly = true
   deps = [
+    ":mojo_public_application_unittests",
     ":mojo_public_bindings_perftests",
     ":mojo_public_bindings_unittests",
     ":mojo_public_environment_unittests",
@@ -105,19 +105,13 @@ group("public_tests") {
     ":mojo_public_utility_unittests",
     ":mojo_system_impl_private_unittests",
   ]
-
-  if (mojo_use_application_in_sdk) {
-    deps += [ ":mojo_public_application_unittests" ]
-  }
 }
 
-if (mojo_use_application_in_sdk) {
-  test("mojo_public_application_unittests") {
-    deps = [
-      ":run_all_unittests",
-      "../../public/cpp/application/tests",
-    ]
-  }
+test("mojo_public_application_unittests") {
+  deps = [
+    ":run_all_unittests",
+    "../../public/cpp/application/tests",
+  ]
 }
 
 test("mojo_public_bindings_unittests") {