Remove some references to PLATFORM_SDK_VERSION

PLATFORM_SDK_VERSION is always >=26 in current
branches.

Bug: 154346346
Test: presubmit
Signed-off-by: Roman Kiryanov <rkir@google.com>
Merged-In: I5c3e1625fcafd704ea164163bbe395aeab6b4173
Change-Id: I30b8ae1dfd0ee7120d9d87a12be6e455a54f7360
2 files changed