git: loader.8: Remove the mention of a.out support

[Aaron LI]

commit e8e25342f4b4efc054206da5c65b6d473462093b
Author: Aaron LI <aly at aaronly.me>
Date:   Wed Sep 30 13:01:08 2026 +0800

    loader.8: Remove the mention of a.out support
    
    The a.out support has been removed in commit
    08f7a79f8fe88d8a4bcf1ee316fdbed5c261c445 in 2021.

Summary of changes:
 stand/boot/common/loader.8 | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/e8e25342f4b4efc054206da5c65b6d473462093b


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