update-engine: Remove code for AUE'd boards

Alex, butterfly and lumpy have been gone fore a while.

BUG=none
TEST=cros_workon_make --test

Change-Id: I511d3109a035d7478da4e52e8eeeb43d158d55f9
Reviewed-on: https://chromium-review.googlesource.com/1097315
Commit-Ready: Thiemo Nagel <tnagel@chromium.org>
Tested-by: Thiemo Nagel <tnagel@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
diff --git a/omaha_request_params.cc b/omaha_request_params.cc
index 97a2ed1..186ea61 100644
--- a/omaha_request_params.cc
+++ b/omaha_request_params.cc
@@ -131,16 +131,10 @@
 }
 
 bool OmahaRequestParams::CollectECFWVersions() const {
-  return base::StartsWith(hwid_, string("SAMS ALEX"),
-                          base::CompareCase::SENSITIVE) ||
-         base::StartsWith(hwid_, string("BUTTERFLY"),
-                          base::CompareCase::SENSITIVE) ||
-         base::StartsWith(hwid_, string("LUMPY"),
-                          base::CompareCase::SENSITIVE) ||
-         base::StartsWith(hwid_, string("PARROT"),
-                          base::CompareCase::SENSITIVE) ||
-         base::StartsWith(hwid_, string("SPRING"),
-                          base::CompareCase::SENSITIVE) ||
+  return base::StartsWith(
+             hwid_, string("PARROT"), base::CompareCase::SENSITIVE) ||
+         base::StartsWith(
+             hwid_, string("SPRING"), base::CompareCase::SENSITIVE) ||
          base::StartsWith(hwid_, string("SNOW"), base::CompareCase::SENSITIVE);
 }