MediaMetadata2: Remove radio constants

Removeing radio constants until their names are finalized.

Bug: 75500592
Test: Build
Change-Id: I10ffed456faa220ae24290ca9dcee6a67e751892
diff --git a/packages/MediaComponents/src/com/android/media/MediaMetadata2Impl.java b/packages/MediaComponents/src/com/android/media/MediaMetadata2Impl.java
index 286f5ee..5fd5812 100644
--- a/packages/MediaComponents/src/com/android/media/MediaMetadata2Impl.java
+++ b/packages/MediaComponents/src/com/android/media/MediaMetadata2Impl.java
@@ -78,8 +78,6 @@
         METADATA_KEYS_TYPE.put(METADATA_KEY_MEDIA_URI, METADATA_TYPE_TEXT);
         METADATA_KEYS_TYPE.put(METADATA_KEY_ADVERTISEMENT, METADATA_TYPE_LONG);
         METADATA_KEYS_TYPE.put(METADATA_KEY_DOWNLOAD_STATUS, METADATA_TYPE_LONG);
-        METADATA_KEYS_TYPE.put(METADATA_KEY_RADIO_FREQUENCY, METADATA_TYPE_FLOAT);
-        METADATA_KEYS_TYPE.put(METADATA_KEY_RADIO_CALLSIGN, METADATA_TYPE_TEXT);
     }
 
     private static final @TextKey