Remove bluetooth.a2dp from matrix as deprecated HAL

Bug: 129121468
Test: Manually play A2DP with presubmit build
Change-Id: Id1ddd780361110f6e944a095ce1f8ae7ae86b9e9
diff --git a/compatibility_matrices/compatibility_matrix.4.xml b/compatibility_matrices/compatibility_matrix.4.xml
index 999c29c..a4e77cc 100644
--- a/compatibility_matrices/compatibility_matrix.4.xml
+++ b/compatibility_matrices/compatibility_matrix.4.xml
@@ -80,14 +80,6 @@
         </interface>
     </hal>
     <hal format="hidl" optional="true">
-        <name>android.hardware.bluetooth.a2dp</name>
-        <version>1.0</version>
-        <interface>
-            <name>IBluetoothAudioOffload</name>
-            <instance>default</instance>
-        </interface>
-    </hal>
-    <hal format="hidl" optional="true">
         <name>android.hardware.bluetooth.audio</name>
         <version>2.0</version>
         <interface>