RFR: 8240264: Comment out verbose logging

[Jose Pereda]

This PR comments out too verbose console logging, as it has been done with some other fprintf calls.
As a follow up of this PR, a custom directive that enables this output if needed can be considered.

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Commit messages:
 - Comment out verbose logging

Changes: https://git.openjdk.java.net/jfx/pull/165/files
 Webrev: https://webrevs.openjdk.java.net/jfx/165/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8240264
  Stats: 3 lines in 2 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jfx/pull/165.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/165/head:pull/165

PR: https://git.openjdk.java.net/jfx/pull/165