RFR: 8299595: Remove terminally deprecated JavaFX GTK 2 library [v5]

[Thiago Milczarek Sayao]

> Simple PR to remove gtk2 library compilation and loading.

Thiago Milczarek Sayao has updated the pull request incrementally with one additional commit since the last revision:

  Remove unused option

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Changes:
  - all: https://git.openjdk.org/jfx/pull/999/files
  - new: https://git.openjdk.org/jfx/pull/999/files/881f85f3..2575a6e4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=999&range=04
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=999&range=03-04

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/999.diff
  Fetch: git fetch https://git.openjdk.org/jfx pull/999/head:pull/999

PR: https://git.openjdk.org/jfx/pull/999