Kernel: Remove duplicative kgettimeofday(timeval&) function

Author: https://github.com/BenWiederhake
Commit: 05d5e3fad9
Pull-request: https://github.com/SerenityOS/serenity/pull/5323
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/bgianfo

Kernel/Process.h

@@ -56,7 +56,6 @@ namespace Kernel {
 
 // FIXME: Should use AK::Time internally
 timeval kgettimeofday();
-void kgettimeofday(timeval&);
 
 #define ENUMERATE_PLEDGE_PROMISES         \
     __ENUMERATE_PLEDGE_PROMISE(stdio)     \