Delete Deprecated classs StandardCharsets (#49762)

Summary:
Pull Request resolved: #49762

Delete Deprecated classs StandardCharsets

changelog: [Android][Breaking] Delete Deprecated classs StandardCharsets

Reviewed By: rshest

Differential Revision: D70441496

fbshipit-source-id: f8f9cf9fc5a90d73d79a6493c7343a80f683c237

Author: mdvacca

packages/react-native/ReactAndroid/api/ReactAndroid.api

@@ -1775,14 +1775,6 @@ public final class com/facebook/react/common/SingleThreadAsserter {
 	public final fun assertNow ()V
 }
 
-public final class com/facebook/react/common/StandardCharsets {
-	public static final field INSTANCE Lcom/facebook/react/common/StandardCharsets;
-	public static final field UTF_16 Ljava/nio/charset/Charset;
-	public static final field UTF_16BE Ljava/nio/charset/Charset;
-	public static final field UTF_16LE Ljava/nio/charset/Charset;
-	public static final field UTF_8 Ljava/nio/charset/Charset;
-}
-
 public abstract interface class com/facebook/react/common/SurfaceDelegate {
 	public abstract fun createContentView (Ljava/lang/String;)V
 	public abstract fun destroyContentView ()V