diff --git a/java/com/android/dialer/constants/Constants.java b/java/com/android/dialer/constants/Constants.java
index 4071e48..dedcf15 100644
--- a/java/com/android/dialer/constants/Constants.java
+++ b/java/com/android/dialer/constants/Constants.java
@@ -16,21 +16,12 @@
 
 package com.android.dialer.constants;
 
-import android.content.Context;
-
 import androidx.annotation.NonNull;
 
-import com.android.dialer.common.Assert;
-import com.android.dialer.proguard.UsedByReflection;
-
 /**
- * Utility to access constants that are different across build variants (Google Dialer, AOSP,
- * etc...). This functionality depends on a an implementation being present in the app that has the
- * same package and the class name ending in "Impl". For example,
- * com.android.dialer.constants.ConstantsImpl. This class is found by the module using reflection.
+ * Utility to access constants
  */
-@UsedByReflection(value = "Constants.java")
-public abstract class Constants {
+public class Constants {
   private static Constants instance;
   private static boolean didInitializeInstance;
 
@@ -38,34 +29,30 @@
   public static synchronized Constants get() {
     if (!didInitializeInstance) {
       didInitializeInstance = true;
-      try {
-        Class<?> clazz = Class.forName(Constants.class.getName() + "Impl");
-        instance = (Constants) clazz.getConstructor().newInstance();
-      } catch (ReflectiveOperationException e) {
-        Assert.fail(
-            "Unable to create an instance of ConstantsImpl. To fix this error include one of the "
-                + "constants modules (googledialer, aosp etc...) in your target.");
-      }
+      instance = new Constants();
     }
     return instance;
   }
 
   @NonNull
-  public abstract String getFileProviderAuthority();
+  public String getFileProviderAuthority() {
+    return "com.android.dialer.files";
+  }
 
   @NonNull
-  public abstract String getAnnotatedCallLogProviderAuthority();
+  public String getAnnotatedCallLogProviderAuthority() {
+    return "com.android.dialer.annotatedcalllog";
+  }
 
   @NonNull
-  public abstract String getPhoneLookupHistoryProviderAuthority();
+  public String getPhoneLookupHistoryProviderAuthority() {
+    return "com.android.dialer.phonelookuphistory";
+  }
 
   @NonNull
-  public abstract String getPreferredSimFallbackProviderAuthority();
-
-  public abstract String getUserAgent(Context context);
-
-  @NonNull
-  public abstract String getSettingsActivity();
+  public String getPreferredSimFallbackProviderAuthority() {
+    return "com.android.dialer.preferredsimfallback";
+  }
 
   protected Constants() {}
 }
diff --git a/java/com/android/dialer/constants/aospdialer/ConstantsImpl.java b/java/com/android/dialer/constants/aospdialer/ConstantsImpl.java
deleted file mode 100644
index 81ba218..0000000
--- a/java/com/android/dialer/constants/aospdialer/ConstantsImpl.java
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.dialer.constants;
-
-import android.content.Context;
-
-import androidx.annotation.NonNull;
-
-import com.android.dialer.proguard.UsedByReflection;
-
-/** Provider config values for AOSP Dialer. */
-@UsedByReflection(value = "Constants.java")
-public class ConstantsImpl extends Constants {
-
-  @Override
-  @NonNull
-  public String getFileProviderAuthority() {
-    return "com.android.dialer.files";
-  }
-
-  @NonNull
-  @Override
-  public String getAnnotatedCallLogProviderAuthority() {
-    return "com.android.dialer.annotatedcalllog";
-  }
-
-  @NonNull
-  @Override
-  public String getPhoneLookupHistoryProviderAuthority() {
-    return "com.android.dialer.phonelookuphistory";
-  }
-
-  @NonNull
-  @Override
-  public String getPreferredSimFallbackProviderAuthority() {
-    return "com.android.dialer.preferredsimfallback";
-  }
-
-  @Override
-  public String getUserAgent(Context context) {
-    return null;
-  }
-
-  @NonNull
-  @Override
-  public String getSettingsActivity() {
-    return "com.android.dialer.app.settings.DialerSettingsActivity";
-  }
-}
diff --git a/java/com/android/dialer/contactphoto/ContactPhotoManagerImpl.java b/java/com/android/dialer/contactphoto/ContactPhotoManagerImpl.java
index b3a3d6d..97e984b 100644
--- a/java/com/android/dialer/contactphoto/ContactPhotoManagerImpl.java
+++ b/java/com/android/dialer/contactphoto/ContactPhotoManagerImpl.java
@@ -201,10 +201,7 @@
         context.getResources().getDimensionPixelSize(R.dimen.contact_browser_list_item_photo_size);
 
     // Get a user agent string to use for URI photo requests.
-    userAgent = Constants.get().getUserAgent(context);
-    if (userAgent == null) {
-      userAgent = "";
-    }
+    userAgent = "";
   }
 
   /** Converts bytes to K bytes, rounding up. Used only for debug log. */