all: refactor imports

src/kern/cpu.zig

@@ -1,7 +1,7 @@
-const std = @import("std");
+const config = @import("config");
 const rtl = @import("rtl");
 const r = @import("root");
-const config = @import("config");
+
 const ke = r.ke;
 const ki = r.ke.private;
 

src/kern/log.zig

@@ -1,10 +1,10 @@
 const std = @import("std");
+const config = @import("config");
 const r = @import("root");
-const rtl = @import("rtl");
+
 const pl = r.pl;
 const ke = r.ke;
 const ki = ke.private;
-const config = @import("config");
 
 var out_lock: ke.SpinLock = .init();
 

src/kern/private.zig

@@ -1,8 +1,7 @@
-const r = @import("root");
-const std = @import("std");
-const rtl = @import("rtl");
 const config = @import("config");
 const init_mod = @import("init.zig");
+const r = @import("root");
+const rtl = @import("rtl");
 
 pub const impl = switch (config.arch) {
     .amd64 => @import("amd64/impl.zig"),

src/kern/root.zig

@@ -1,5 +1,3 @@
-const config = @import("config");
-
 // === Exported Modules ===
 pub const private = @import("private.zig");
 

src/kern/um/impl.zig

@@ -1,5 +1,5 @@
-const std = @import("std");
 const r = @import("root");
+
 const c = r.pl.impl.c;
 const ke = r.ke;
 const ki = ke.private;