Removed unused *_DYNAMIC_MEMORY conditional statements

Test: compilation from the top-level directory
Change-Id: I181e6ae2e71c232ca0dc733dabda5cb0fc2672d8
diff --git a/stack/avdt/avdt_int.h b/stack/avdt/avdt_int.h
index f472482..63a2cdb 100644
--- a/stack/avdt/avdt_int.h
+++ b/stack/avdt/avdt_int.h
@@ -732,13 +732,7 @@
 /******************************************************************************
 ** Main Control Block
 *******************************************************************************/
-#if (AVDT_DYNAMIC_MEMORY == FALSE)
-extern tAVDT_CB  avdt_cb;
-#else
-extern tAVDT_CB *avdt_cb_ptr;
-#define avdt_cb (*avdt_cb_ptr)
-#endif
-
+extern tAVDT_CB avdt_cb;
 
 /* L2CAP callback registration structure */
 extern const tL2CAP_APPL_INFO avdt_l2c_appl;