Remove unused Feature Flag: lazilyLoadViewManagers

Summary:
Remove unused feature flag. This is not used within Facebook and I'm not aware of usage outside of FB.

Changelog: [Removed] Removing Android feature flag: lazilyLoadViewManagers

Reviewed By: mdvacca

Differential Revision: D20788210

fbshipit-source-id: 435316e3de7830d7cb7f14537351883e4fc6eeaa

Author: JoshuaGross

ReactAndroid/src/main/java/com/facebook/react/config/ReactFeatureFlags.java

@@ -16,9 +16,6 @@
  */
 public class ReactFeatureFlags {
 
-  /** Whether we should load a specific view manager immediately or when it is accessed by JS */
-  public static boolean lazilyLoadViewManagers = false;
-
   /**
    * Should this application use TurboModules? If yes, then any module that inherits {@link
    * com.facebook.react.turbomodule.core.interfaces.TurboModule} will NOT be passed in to C++

ReactAndroid/src/main/java/com/facebook/react/uimanager/UIManagerModuleConstantsHelper.java

@@ -11,7 +11,6 @@
 
 import androidx.annotation.Nullable;
 import com.facebook.react.common.MapBuilder;
-import com.facebook.react.config.ReactFeatureFlags;
 import com.facebook.systrace.SystraceMessage;
 import java.util.List;
 import java.util.Map;
@@ -35,9 +34,7 @@
   /* package */ static Map<String, Object> createConstants(
       UIManagerModule.ViewManagerResolver resolver) {
     Map<String, Object> constants = UIManagerModuleConstants.getConstants();
-    if (!ReactFeatureFlags.lazilyLoadViewManagers) {
-      constants.put("ViewManagerNames", resolver.getViewManagerNames());
-    }
+    constants.put("ViewManagerNames", resolver.getViewManagerNames());
     constants.put("LazyViewManagersEnabled", true);
     return constants;
   }