init: Remove check_bugs() leftovers

Everything is converted over to arch_cpu_finalize_init(). Remove the
check_bugs() leftovers including the empty stubs in asm-generic, alpha,
parisc, powerpc and xtensa.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Link: https://lore.kernel.org/r/20230613224545.553215951@linutronix.de

Author: KAGA-KOKO

arch/alpha/include/asm/bugs.h

@@ -103,7 +103,6 @@
 #include <net/net_namespace.h>
 
 #include <asm/io.h>
-#include <asm/bugs.h>
 #include <asm/setup.h>
 #include <asm/sections.h>
 #include <asm/cacheflush.h>
@@ -1079,10 +1078,6 @@ asmlinkage __visible void __init __no_sanitize_address __noreturn start_kernel(v
 	delayacct_init();
 
 	arch_cpu_finalize_init();
-	/* Temporary conditional until everything has been converted */
-#ifndef CONFIG_ARCH_HAS_CPU_FINALIZE_INIT
-	check_bugs();
-#endif
 
 	acpi_subsystem_init();
 	arch_post_acpi_subsys_init();