Technical debt paydown

Removed unused function.
Removed unused data table.
Cleaned up TAG strings.

Change-Id: I4c5dbd72f7363dd0a7a60eb2498e122adda43211
diff --git a/modules/usbaudio/logging.c b/modules/usbaudio/logging.c
index 0a05511..d3f7abf 100644
--- a/modules/usbaudio/logging.c
+++ b/modules/usbaudio/logging.c
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#define LOG_TAG "usb_logging"
+#define LOG_TAG "audio_logging"
 /*#define LOG_NDEBUG 0*/
 
 #include <string.h>