Removed obsolete comment on PLATFORM_SYSTEMSDK_MIN_VERSION

The min version has been set.

Bug: 78023556
Test: no need
Change-Id: I12f816dfb9be7e9e945a68540f4efcfcc32b7cc2
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 8a1602e..b089da5 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -207,9 +207,6 @@
   # to the public SDK where platform essentially supports all previous SDK versions,
   # platform supports only a few number of recent system SDK versions as some of
   # old system APIs are gradually deprecated, removed and then deleted.
-  # However, currently in P, we only support the single latest version since there
-  # is no old system SDK versions. Therefore, this is set to empty for now. This
-  # should later (in post P) be set to a number, like 28.
   PLATFORM_SYSTEMSDK_MIN_VERSION := 28
 endif