Remove unnecessary compat-configs from sdk

The sdk will automatically export any platform_compat_config modules
in any apex in its apexes property.

Bug: 232401814
Test: m art-module-sdk
      # Before and after this change and compare to make sure that
      # they are bitwise identical.
Change-Id: Ied42d636719b239a65a43a1ef455a0b5740bf82f
diff --git a/build/sdk/Android.bp b/build/sdk/Android.bp
index 9cafb8a..b47bdc2 100644
--- a/build/sdk/Android.bp
+++ b/build/sdk/Android.bp
@@ -99,10 +99,6 @@
                 "com.android.art",
             ],
 
-            compat_configs: [
-                "libcore-platform-compat-config",
-            ],
-
             java_header_libs: [
                 // Needed by any module that builds against any non-numeric
                 // sdk_version other than "none".