Remove unneeded JNI registrations.

chrome/browser/android/field_trial_helper.cc

Index: chrome/browser/android/field_trial_helper.cc
diff --git a/chrome/browser/android/field_trial_helper.cc b/chrome/browser/android/field_trial_helper.cc
index b3be6d2233076fa422a51b4b827c87d05f89e7b2..795a6dd1e0c03a9ad9837eced49e03d0e6e85b0b 100644
--- a/chrome/browser/android/field_trial_helper.cc
+++ b/chrome/browser/android/field_trial_helper.cc
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "chrome/browser/android/field_trial_helper.h"
-
 #include <jni.h>
 
 #include "base/android/jni_string.h"
@@ -21,13 +19,3 @@ static jstring GetFieldTrialFullName(JNIEnv* env,
       env,
       base::FieldTrialList::FindFullName(trial_name)).Release();
 }
-
-namespace chrome {
-namespace android {
-
-bool RegisterFieldTrialHelper(JNIEnv* env) {
-  return RegisterNativesImpl(env);
-}
-
-}  // namespace android
-}  // namespace chrome