Remove HIDL gatekeeper from compat matrix

This HIDL interface is deprecate in level 8. The AIDL gatekeeper
interface should be used instead.

Test: none
Bug: 205760843
Change-Id: I58b8ca77ae9ab8d055a45871918dbd91435823a7
diff --git a/compatibility_matrices/compatibility_matrix.current.xml b/compatibility_matrices/compatibility_matrix.current.xml
index 568d94c..0caf1c3 100644
--- a/compatibility_matrices/compatibility_matrix.current.xml
+++ b/compatibility_matrices/compatibility_matrix.current.xml
@@ -277,14 +277,6 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
-        <name>android.hardware.gatekeeper</name>
-        <version>1.0</version>
-        <interface>
-            <name>IGatekeeper</name>
-            <instance>default</instance>
-        </interface>
-    </hal>
     <hal format="aidl" optional="true">
         <name>android.hardware.gatekeeper</name>
         <version>1</version>