Remove deprecated String constants for Charsets

Use Kotlin Charsets from the `kotlin.text` package, the `java.nio.charset.StandardCharsets` or the `com.google.common.base.Charsets` instead.

#minor-release

PiperOrigin-RevId: 532469103
(cherry picked from commit 1f803a68ea66052a56e24051154dbbaec8c50d7a)

library/common/src/main/java/com/google/android/exoplayer2/C.java

@@ -95,36 +95,6 @@ public final class C {
   /** The number of bytes per float. */
   /** The number of bytes per float. */
   public static final int BYTES_PER_FLOAT = 4;
   public static final int BYTES_PER_FLOAT = 4;
 
 
-  /**
-   * @deprecated Use {@link java.nio.charset.StandardCharsets} or {@link
-   *     com.google.common.base.Charsets} instead.
-   */
-  @Deprecated public static final String ASCII_NAME = "US-ASCII";
-
-  /**
-   * @deprecated Use {@link java.nio.charset.StandardCharsets} or {@link
-   *     com.google.common.base.Charsets} instead.
-   */
-  @Deprecated public static final String UTF8_NAME = "UTF-8";
-
-  /**
-   * @deprecated Use {@link java.nio.charset.StandardCharsets} or {@link
-   *     com.google.common.base.Charsets} instead.
-   */
-  @Deprecated public static final String ISO88591_NAME = "ISO-8859-1";
-
-  /**
-   * @deprecated Use {@link java.nio.charset.StandardCharsets} or {@link
-   *     com.google.common.base.Charsets} instead.
-   */
-  @Deprecated public static final String UTF16_NAME = "UTF-16";
-
-  /**
-   * @deprecated Use {@link java.nio.charset.StandardCharsets} or {@link
-   *     com.google.common.base.Charsets} instead.
-   */
-  @Deprecated public static final String UTF16LE_NAME = "UTF-16LE";
-
   /** The name of the serif font family. */
   /** The name of the serif font family. */
   public static final String SERIF_NAME = "serif";
   public static final String SERIF_NAME = "serif";