Removed an obsolete TODO.

The intended check was to ensure system image won't be built as a
chained partition when using dynamic partitions. Because such an image
can't be verified by bootloader.

As it evolves, GSI system image has been built against the intended
check. Because GSI system image will be verified by first stage init in
userspace.

Bug: 80195851
Test: TreeHugger
Change-Id: I45b079799e5d7443e82d73d43e2b63c613f33165
diff --git a/core/Makefile b/core/Makefile
index e6bf05a..dc06051 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1408,9 +1408,6 @@
   $(error vboot 1.0 doesn't support logical partition)
 endif
 
-# TODO(b/80195851): Should not define BOARD_AVB_SYSTEM_KEY_PATH without
-# BOARD_AVB_SYSTEM_DETACHED_VBMETA.
-
 endif # PRODUCT_USE_DYNAMIC_PARTITIONS
 
 # $(1): the path of the output dictionary file