Remove obsolete Support Library guidance from version_defaults.mk

Test: n/a docs only
Fixes: 133228727
Change-Id: I10cdd9a4dfe8c508417f7b80320e308c236f2c8e
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 6738a77..4d4d1a5 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -73,11 +73,6 @@
 # Update this value when the platform version changes (rather
 # than overriding it somewhere else).  Can be an arbitrary string.
 
-# When you add a new PLATFORM_VERSION which will result in a new
-# PLATFORM_SDK_VERSION please ensure you add a corresponding isAtLeast*
-# method in the following java file:
-# frameworks/support/compat/gingerbread/android/support/v4/os/BuildCompat.java
-
 # When you change PLATFORM_VERSION for a given PLATFORM_SDK_VERSION
 # please add that PLATFORM_VERSION as well as clean up obsolete PLATFORM_VERSION's
 # in the following text file:
@@ -114,10 +109,6 @@
   # SDK version the branch is based on and PLATFORM_VERSION_CODENAME holds
   # the code-name of the new development work.
 
-  # When you change PLATFORM_SDK_VERSION please ensure you also update the
-  # corresponding methods for isAtLeast* in the following java file:
-  # frameworks/support/compat/gingerbread/android/support/v4/os/BuildCompat.java
-
   # When you increment the PLATFORM_SDK_VERSION please ensure you also
   # clear out the following text file of all older PLATFORM_VERSION's:
   # cts/tests/tests/os/assets/platform_versions.txt