Delete delegate methods in ICU_Delegate

Commits 8d9485d and 6ed7866 deleted native methods in ICU.java.
This correspondingly delete the delegates in ICU_Delegate.java.

Bug: 74062470
Test: N/A
Change-Id: I764fccf53fee85819d4437d726e31c693d43efe2
diff --git a/bridge/src/libcore/icu/ICU_Delegate.java b/bridge/src/libcore/icu/ICU_Delegate.java
index 708cf62..04e7653 100644
--- a/bridge/src/libcore/icu/ICU_Delegate.java
+++ b/bridge/src/libcore/icu/ICU_Delegate.java
@@ -34,22 +34,11 @@
     // --- Native methods accessing ICU's database.
 
     @LayoutlibDelegate
-    /*package*/ static String getBestDateTimePatternNative(String skeleton, String localeName) {
-        return DateTimePatternGenerator.getInstance(new ULocale(localeName))
-                .getBestPattern(skeleton);
-    }
-
-    @LayoutlibDelegate
     /*package*/ static String[] getAvailableLocalesNative() {
         return new String[0];
     }
 
     @LayoutlibDelegate
-    /*package*/ static String getCurrencyCode(String locale) {
-        return "";
-    }
-
-    @LayoutlibDelegate
     /*package*/ static String getISO3Country(String locale) {
         return "";
     }