RFR: JDK-8297332: Remove easy warnings in base

[Andy Goryachev]

On Mon, 21 Nov 2022 20:46:57 GMT, Andy Goryachev <angorya at openjdk.org> wrote:

>> I only fixed the warnings listed in the ticket :)
>
> but the ticket specifies (javafx.)base, right?

let's create a followup ticket - the messed up statements in Disposer and especially in PrismFontFactory:1401 are worrying.

cc: @prrace

-------------

PR: https://git.openjdk.org/jfx/pull/957