os,net: cleanup deprecated @VROOT usages

vlib/os/os.v

@@ -495,7 +495,6 @@ pub fn walk(path string, f fn (string)) {
 pub fn log(s string) {
 	//$if macos {
 	// Use NSLog() on macos
-	// C.darwin_log(s)
 	//} $else {
 	println('os.log: ' + s)
 	//}

vlib/os/os_darwin.c.v

@@ -3,8 +3,6 @@
 // that can be found in the LICENSE file.
 module os
 
-#include "@VROOT/vlib/os/os_darwin.m"
-
 pub const (
 	sys_write         = 4
 	sys_open          = 5
@@ -14,5 +12,3 @@ pub const (
 	sys_open_nocancel = 398
 	sys_stat64        = 338
 )
-
-fn C.darwin_log(s string)

vlib/os/os_darwin.m

@@ -1,7 +0,0 @@
-/*
-NSString* nsstring(string s);
-
-void darwin_log(string s) {
-	NSLog(nsstring(s));
-}
-*/