os: libproc.h on macos only

compiler/cheaders.v

@@ -17,7 +17,8 @@ CommonCHeaders = '
 #endif
 
 #ifdef __APPLE__
-#include <execinfo.h> // for backtrace and backtrace_symbols_fd
+#include <libproc.h> // proc_pidpath
+#include <execinfo.h> // backtrace and backtrace_symbols_fd
 #endif
 
 

vlib/os/os.v

@@ -8,10 +8,6 @@ module os
 #include <signal.h>
 #include <errno.h>
 
-$if mac {
-	#include <libproc.h> // proc_pidpath
-}
-
 /*
 struct dirent {
                d_ino int

vlib/time/time.v

@@ -6,7 +6,6 @@ module time
 
 import rand
 
-// https://en.wikipedia.org/wiki/Month#Julian_and_Gregorian_calendars
 const (
 	MonthDays = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
 )