Remove unused microdroid kernel module build rules

Unused since aosp/2274146

Test: build
Change-Id: Ib31665043ab12ebaa0fe563f5e83ba80fcabaa50

Android.bp

diff --git a/Android.bp b/Android.bp
index 85dcdb1..8dcb7b6 100644
--- a/Android.bp
+++ b/Android.bp
@@ -35,14 +35,3 @@
     name: "virt_device_prebuilts_kernel_modules_all-5.10-x86_64",
     srcs: ["*.ko"],
 }
-
-filegroup {
-    name: "virt_device_prebuilts_kernel_modules_microdroid-5.10-x86_64",
-    srcs: [
-        "virtio-rng.ko",
-        "virtio_blk.ko",
-        "virtio_console.ko",
-        "virtio_pci.ko",
-        "vmw_vsock_virtio_transport.ko",
-    ],
-}