Remove health backup instance from the manifest.

This HAL is served from the system.img, so it shouldn't be in
this manifest.

I should have manually removed it, but I filed b/71802285 so that
more tooling is smart enough not to add it.

Bug: 71707530
Test: vts_treble_vintf_test case that was failing is now passing.
Change-Id: I4e5d9bf8120e9fb087188587f18a338a372a2af2
Merged-In: I4e5d9bf8120e9fb087188587f18a338a372a2af2
(cherry picked from commit 151b5b3a0896c4d4d0f1a5e5b3411c551fbeccb3)
(cherry picked from commit e223ed82466110375d3fb3399e5f859ef1fffd05)
diff --git a/shared/config/manifest.xml b/shared/config/manifest.xml
index c593474..dd5cd3e 100644
--- a/shared/config/manifest.xml
+++ b/shared/config/manifest.xml
@@ -130,15 +130,6 @@
         </interface>
     </hal>
     <hal format="hidl">
-        <name>android.hardware.health</name>
-        <transport>hwbinder</transport>
-        <version>2.0</version>
-        <interface>
-            <name>IHealth</name>
-            <instance>backup</instance>
-        </interface>
-    </hal>
-    <hal format="hidl">
         <name>android.hardware.keymaster</name>
         <transport>hwbinder</transport>
         <version>3.0</version>