MAINTAINERS: Remove Chris Browy

Chris Browy's listed email address is undeliverable: The recipient server did not accept our requests to connect; it times out on attempts to connect by my sending mail server (gmail): [avery-design.com 99.83.249.127: timed out] [avery-design.com 75.2.78.167: timed out] Remove his name from the file. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20260306120555.2035421-7-peter.maydell@linaro.org