diff --git a/services/audiopolicy/AudioPolicyInterface.h b/services/audiopolicy/AudioPolicyInterface.h
index 4dcc6b2..dd3f144 100644
--- a/services/audiopolicy/AudioPolicyInterface.h
+++ b/services/audiopolicy/AudioPolicyInterface.h
@@ -67,16 +67,6 @@
         API_INPUT_TELEPHONY_RX, // used for capture from telephony RX path
     } input_type_t;
 
-   enum {
-        API_INPUT_CONCURRENCY_NONE = 0,
-        API_INPUT_CONCURRENCY_CALL = (1 << 0),      // Concurrency with a call
-        API_INPUT_CONCURRENCY_CAPTURE = (1 << 1),   // Concurrency with another capture
-
-        API_INPUT_CONCURRENCY_ALL = (API_INPUT_CONCURRENCY_CALL | API_INPUT_CONCURRENCY_CAPTURE),
-   };
-
-   typedef uint32_t concurrency_type__mask_t;
-
 public:
     virtual ~AudioPolicyInterface() {}
     //
@@ -150,8 +140,7 @@
                                      input_type_t *inputType) = 0;
     // indicates to the audio policy manager that the input starts being used.
     virtual status_t startInput(audio_io_handle_t input,
-                                audio_session_t session,
-                                concurrency_type__mask_t *concurrency) = 0;
+                                audio_session_t session) = 0;
     // indicates to the audio policy manager that the input stops being used.
     virtual status_t stopInput(audio_io_handle_t input,
                                audio_session_t session) = 0;