Remove unused libcore.icu.ICU from LocaleStoreTest

LocaleStore no longer uses ICU.addLikelySubtags, and thus the test
no longer need to shadow it on robolectric.

Bug: 160606356
Bug: 161101723
Test: m RunLocalePickerRoboTests
Merged-In: I5b6fccb24ca9c98209d7aea607a9500501d9d782
Change-Id: I5b6fccb24ca9c98209d7aea607a9500501d9d782
(cherry picked from commit dce4b38324e6afb5fd4013750c077f1f0036c23f)
diff --git a/tests/src/com/android/localepicker/LocaleStoreTest.java b/tests/src/com/android/localepicker/LocaleStoreTest.java
index ae406e7..fa953ee 100644
--- a/tests/src/com/android/localepicker/LocaleStoreTest.java
+++ b/tests/src/com/android/localepicker/LocaleStoreTest.java
@@ -26,11 +26,8 @@
 
 import com.android.internal.app.LocalePicker;
 import com.android.localepicker.LocaleStore.LocaleInfo;
-import com.android.localepicker.LocaleStoreTest.ShadowICU;
 import com.android.localepicker.LocaleStoreTest.ShadowLocalePicker;
 
-import libcore.icu.ICU;
-
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -45,7 +42,6 @@
 @Config(
         shadows = {
                 ShadowLocalePicker.class,
-                ShadowICU.class,
         })
 public class LocaleStoreTest {
 
@@ -76,14 +72,4 @@
             return new String[] { "en-US", "zh-HK", "ja-JP", "zh-TW" };
         }
     }
-
-    @Implements(ICU.class)
-    public static class ShadowICU {
-
-        @Implementation
-        public static Locale addLikelySubtags(Locale locale) {
-            ULocale uLocale = ULocale.addLikelySubtags(ULocale.forLocale(locale));
-            return uLocale.toLocale();
-        }
-    }
-}
\ No newline at end of file
+}