Move ACMCodecDB::ValidPayloadType to RentACodec

webrtc/modules/audio_coding/main/acm2/acm_codec_database.h

Index: webrtc/modules/audio_coding/main/acm2/acm_codec_database.h
diff --git a/webrtc/modules/audio_coding/main/acm2/acm_codec_database.h b/webrtc/modules/audio_coding/main/acm2/acm_codec_database.h
index 885d106b435ea3cb846afae06462e3da89af09fc..ede0e6bccdc34ec081d79805d00ac508b688820e 100644
--- a/webrtc/modules/audio_coding/main/acm2/acm_codec_database.h
+++ b/webrtc/modules/audio_coding/main/acm2/acm_codec_database.h
@@ -85,12 +85,6 @@ class ACMCodecDB {
   //   codec sampling frequency if successful, otherwise -1.
   static int CodecFreq(int codec_id);
 
-  // Check if the payload type is valid, meaning that it is in the valid range
-  // of 0 to 127.
-  // Input:
-  //   [payload_type] - payload type.
-  static bool ValidPayloadType(int payload_type);
-
  private:
   // Databases with information about the supported codecs
   // database_ - stored information about all codecs: payload type, name,