[PARQUET-2460] Removing deprecated code

[vinooganesh]

This PR removes the deprecated parquet-format java code as discussed at the monthly meeting and email list.

Jira

• My PR addresses the following Parquet Jira issues and references them in the PR title.
  • https://issues.apache.org/jira/browse/PARQUET-2460

Commits

• My commits all reference Jira issues in their subject lines. In addition, my commits follow the guidelines from "How to write a good git commit message":
  1. Subject is separated from body by a blank line
  2. Subject is limited to 50 characters (not including Jira issue reference)
  3. Subject does not end with a period
  4. Subject uses the imperative mood ("add", not "adding")
  5. Body wraps at 72 characters
  6. Body explains "what" and "why", not "how"

[Fokko]

Published the JAR locally, and checked it against parquet-mr and nothing breaks :) Thanks for cleaning this up @vinooganesh

[vinooganesh]

Thanks for testing @Fokko!