Kernel: Remove i686 support

Author: https://github.com/supercomputer7
Commit: 5ff318cf3a
Pull-request: https://github.com/SerenityOS/serenity/pull/15467
Issue: https://github.com/SerenityOS/serenity/issues/15444
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/Hendiadyoin1
Reviewed-by: https://github.com/fuel-pcbox

Kernel/kprintf.cpp

@@ -8,7 +8,7 @@
 #include <AK/StringView.h>
 #include <AK/Types.h>
 #include <Kernel/Arch/DebugOutput.h>
-#if ARCH(I386) || ARCH(X86_64)
+#if ARCH(X86_64)
 #    include <Kernel/Arch/x86/common/BochsDebugOutput.h>
 #endif
 #include <Kernel/Devices/ConsoleDevice.h>
@@ -54,7 +54,7 @@ static void critical_console_out(char ch)
     if (s_serial_debug_enabled)
         serial_putch(ch);
 
-#if ARCH(I386) || ARCH(X86_64)
+#if ARCH(X86_64)
     // No need to output things to the real ConsoleDevice as no one is likely
     // to read it (because we are in a fatal situation, so only print things and halt)
     bochs_debug_output(ch);
@@ -79,7 +79,7 @@ static void console_out(char ch)
     if (DeviceManagement::the().is_console_device_attached()) {
         DeviceManagement::the().console_device().put_char(ch);
     } else {
-#if ARCH(I386) || ARCH(X86_64)
+#if ARCH(X86_64)
         bochs_debug_output(ch);
 #endif
     }
@@ -139,7 +139,7 @@ static inline void internal_dbgputch(char ch)
 {
     if (s_serial_debug_enabled)
         serial_putch(ch);
-#if ARCH(I386) || ARCH(X86_64)
+#if ARCH(X86_64)
     bochs_debug_output(ch);
 #endif
 }