No need to dispose Colors

Change-Id: If28050d631bc2b26fe561778efb1fb251f3d0284
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.text/+/185935
Tested-by: Platform Bot <platform-bot@eclipse.org>
Reviewed-by: Alexander Kurtakov <akurtako@redhat.com>
4 files changed