[deprecation] clean up false uses of finatra validation

Problem

we want to use standard bean annotations

Solution

remove false uses of old validation annotations so that we can more easily kill it

Differential Revision: https://phabricator.twitter.biz/D1012963

jackson/src/test/scala/com/twitter/finatra/jackson/BUILD.bazel

@@ -42,8 +42,6 @@ junit_tests(
         "finatra/jackson/src/main/scala/com/twitter/finatra/jackson/streaming",
         "finatra/jackson/src/main/scala/com/twitter/finatra/json",
         "finatra/jackson/src/test/java/com/twitter/finatra/jackson",
-        "finatra/validation/src/main/java/com/twitter/finatra/validation",
-        "finatra/validation/src/main/scala/com/twitter/finatra/validation",
         "finatra/validation/src/test/scala/com/twitter/finatra/validation",
         "util/util-core:scala",
         "util/util-jackson/src/main/scala/com/twitter/util/jackson",