Remove the mojo_use_application_in_sdk GN variable.

mojo/public/cpp/bindings/tests/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("../../../mojo_application.gni")
 import("../../../mojo_sdk.gni")
-import("../../../mojo.gni")
 
 mojo_sdk_source_set("tests") {
   testonly = true
 
   sources = [
     "array_unittest.cc",
     "binding_callback_unittest.cc",
     "binding_unittest.cc",
     "bounds_checker_unittest.cc",
     "buffer_unittest.cc",
@@ skipping 62 matching lines @@
 
 mojo_sdk_source_set("mojo_public_bindings_test_utils") {
   sources = [
     "validation_test_input_parser.cc",
     "validation_test_input_parser.h",
   ]
 
   mojo_sdk_deps = [ "mojo/public/c/system" ]
 }
 
-if (mojo_use_application_in_sdk) {
-  mojo_native_application("versioning_test_service") {
-    testonly = true
+mojo_native_application("versioning_test_service") {
+  testonly = true
 
-    deps = [
-      ":versioning_test_service_source_set",
-    ]
-  }
+  deps = [
+    ":versioning_test_service_source_set",
+  ]
+}
 
-  mojo_sdk_source_set("versioning_test_service_source_set") {
-    testonly = true
-    visibility = [ ":*" ]
+mojo_sdk_source_set("versioning_test_service_source_set") {
+  testonly = true
+  visibility = [ ":*" ]
 
-    sources = [
-      "versioning_test_service.cc",
-    ]
+  sources = [
+    "versioning_test_service.cc",
+  ]
 
-    mojo_sdk_deps = [
-      "mojo/public/cpp/application:standalone",
-      "mojo/public/cpp/bindings",
-      "mojo/public/cpp/system",
-      "mojo/public/interfaces/bindings/tests:versioning_test_service_interfaces",
-    ]
-  }
+  mojo_sdk_deps = [
+    "mojo/public/cpp/application:standalone",
+    "mojo/public/cpp/bindings",
+    "mojo/public/cpp/system",
+    "mojo/public/interfaces/bindings/tests:versioning_test_service_interfaces",
+  ]
+}
 
-  mojo_native_application("versioning_apptests") {
-    testonly = true
+mojo_native_application("versioning_apptests") {
+  testonly = true
 
-    deps = [
-      ":versioning_apptest_source_set",
-    ]
-    data_deps = [
-      ":versioning_test_service",
-    ]
-  }
+  deps = [
+    ":versioning_apptest_source_set",
+  ]
+  data_deps = [
+    ":versioning_test_service",
+  ]
+}
 
-  mojo_sdk_source_set("versioning_apptest_source_set") {
-    testonly = true
-    visibility = [ ":*" ]
+mojo_sdk_source_set("versioning_apptest_source_set") {
+  testonly = true
+  visibility = [ ":*" ]
 
-    sources = [
-      "versioning_apptest.cc",
-    ]
+  sources = [
+    "versioning_apptest.cc",
+  ]
 
-    mojo_sdk_deps = [
-      "mojo/public/cpp/application:standalone",
-      "mojo/public/cpp/application:test_support_standalone",
-      "mojo/public/cpp/bindings",
-      "mojo/public/cpp/system",
-      "mojo/public/interfaces/bindings/tests:versioning_test_client_interfaces",
-    ]
-  }
+  mojo_sdk_deps = [
+    "mojo/public/cpp/application:standalone",
+    "mojo/public/cpp/application:test_support_standalone",
+    "mojo/public/cpp/bindings",
+    "mojo/public/cpp/system",
+    "mojo/public/interfaces/bindings/tests:versioning_test_client_interfaces",
+  ]
 }