Remove dead-code readDvbString

library/core/src/main/java/com/google/android/exoplayer2/metadata/dvbsi/AitDecoder.java

@@ -133,63 +133,4 @@ public class AitDecoder implements MetadataDecoder {
         return new Metadata(aits);
         return new Metadata(aits);
     }
     }
 
 
-    static final String dvbCharset[] = {
-        "ISO-8859-15",
-        "ISO-8859-5",
-        "ISO-8859-6",
-        "ISO-8859-7",
-        "ISO-8859-8",
-        "ISO-8859-9",
-        null,
-        "ISO-8859-11",
-        null,
-        "ISO-8859-13",
-        null,
-        "ISO-8859-15",
-        null,
-        null,
-        null,
-        null,
-        //0x10
-        null,
-        null,
-        null,
-        null,
-        null,
-        null,
-        null,
-        null,
-        null,
-        null,
-        null,
-        null,
-        null,
-        null,
-        null,
-        null,
-    };
-
-    static String readDvbString(ParsableByteArray data, int length) {
-        if(length == 0) return null;
-        int charsetSelect = data.peekUnsignedByte();
-        if(charsetSelect >= 0x20)
-            return data.readString(length, Charset.forName("ISO-8859-15"));
-        data.skipBytes(1);
-        if(charsetSelect == 0x1f) {
-            data.skipBytes(length - 1);
-            return null;
-        }
-        if(charsetSelect != 0x10)
-            return data.readString(length-1, Charset.forName(dvbCharset[charsetSelect]));
-        if(length == 2) {
-            data.skipBytes(1);
-            return null;
-        }
-        charsetSelect = data.readUnsignedShort();
-        if(charsetSelect > 1 && charsetSelect < 0x10) {
-            String charsetName = "ISO-8859-" + charsetSelect;
-            return data.readString(length-3, Charset.forName(charsetName));
-        }
-        return null;
-    }
 }
 }