Revert "[NS D03] Migrate the bad wifi avoidance policy"

Revert submission 10338939

Reason for revert: The feature was punted out of R.
Reverted Changes:
I32c12702c:[NS D04] Implement a simple speed comparison betwe...
I688593cc0:[NS D03] Migrate the bad wifi avoidance policy

Change-Id: I640635a1ed94bed3b53466abe2a988caf0eca2b0

core/java/com/android/internal/util/FunctionalUtils.java

@@ -16,16 +16,12 @@
 
 package com.android.internal.util;
 
-import android.annotation.NonNull;
-import android.annotation.Nullable;
 import android.os.RemoteException;
 import android.util.ExceptionUtils;
 
-import java.util.Collection;
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 import java.util.function.Function;
-import java.util.function.Predicate;
 import java.util.function.Supplier;
 
 /**
@@ -222,20 +218,4 @@ public class FunctionalUtils {
             }
         }
     }
-
-    /**
-     * Find the first element in the list that matches the predicate.
-     *
-     * The standard Java way of doing this is to use streams, which is very expensive.
-     *
-     * @return the first matching element, or null if none.
-     */
-    @Nullable
-    public static <T> T findFirst(@NonNull final Collection<T> haystack,
-            @NonNull final Predicate<T> p) {
-        for (final T needle : haystack) {
-            if (p.test(needle)) return needle;
-        }
-        return null;
-    }
 }