ROADMAP: Remove validation and testing targets

Validation is partly covered by cdcabde (schema: JSON Schema and
validator for `config.json`, 2016-01-19, opencontainers#313) and subequent JSON
Schema work.  The remainder of these targets are handled by ocitools
[1].

[1]: https://github.com/opencontainers/ocitools

Signed-off-by: W. Trevor King <wking@tremily.us>

ROADMAP.md

@@ -26,18 +26,6 @@ Proposal: make it an optional feature
 
 *Owner:* hqhq (was vishh) robdolinms, bcorrie
 
-### Validation Tooling (Target release: v0.3.0)
-
-Provide validation tooling for compliance with OCI spec and runtime environment.
-
-*Owner:* mrunalp
-
-### Testing Framework
-
-Provide a testing framework for compliance with OCI spec and runtime environment.
-
-*Owner:* liangchenye
-
 ### Version Schema
 
 Decide on a robust versioning schema for the spec as it evolves.