RFR: 8289390: Fix warnings: type parameter E is hiding the type E

[Kevin Rushforth]

On Wed, 6 Jul 2022 14:45:13 GMT, Andy Goryachev <duke at openjdk.org> wrote:

> - trivial change removes 4 eclipse warnings

Looks good.

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

Marked as reviewed by kcr (Lead).

PR: https://git.openjdk.org/jfx/pull/812