hwc: Remove impl level from VINTF fragment xmls

Schema for VINTF fragment xmls does not allow for "impl" tag,
leading to VTS failures.

CRs-Fixed: 2530094
Change-Id: I8e5344144d4f47efe13d81766d8a70dcdb8b6c94
diff --git a/gralloc/android.hardware.graphics.mapper-impl-qti-display.xml b/gralloc/android.hardware.graphics.mapper-impl-qti-display.xml
index 4bb2bd8..4e5c3ad 100644
--- a/gralloc/android.hardware.graphics.mapper-impl-qti-display.xml
+++ b/gralloc/android.hardware.graphics.mapper-impl-qti-display.xml
@@ -40,7 +40,6 @@
     <hal format="hidl">
         <name>android.hardware.graphics.mapper</name>
         <transport arch="32+64">passthrough</transport>
-        <impl level="generic"></impl>
         <version>3.0</version>
         <version>4.0</version>
         <interface>
diff --git a/gralloc/vendor.qti.hardware.display.allocator-service.xml b/gralloc/vendor.qti.hardware.display.allocator-service.xml
index 5b4c5e3..506c58b 100644
--- a/gralloc/vendor.qti.hardware.display.allocator-service.xml
+++ b/gralloc/vendor.qti.hardware.display.allocator-service.xml
@@ -30,7 +30,6 @@
     <hal format="hidl">
         <name>android.hardware.graphics.allocator</name>
         <transport>hwbinder</transport>
-        <impl level="generic"></impl>
         <version>3.0</version>
         <version>4.0</version>
         <interface>