vlib: remove unused `os2` module (#11053)

vlib/os2/keep_vfmt_happy.v

@@ -1,2 +0,0 @@
-// this keeps vfmt happy
-module os2

vlib/os2/os2_darwin.c.v

@@ -1,36 +0,0 @@
-module os2
-
-#include <fcntl.h>
-
-struct File {
-	fd int
-}
-
-fn C.perror(&char)
-
-fn C.open(&byte, int, int) int
-
-fn C.write(voidptr, &byte, int) int
-
-fn C.close(int) int
-
-pub fn create(path string) ?File {
-	fd := C.open(path.str, C.O_CREAT | C.O_TRUNC | C.O_WRONLY, o644) // 511
-	if fd == -1 {
-		return error('failed to create "$path":')
-		// os.print_c_errno()
-	}
-	return File{fd}
-}
-
-pub fn (f File) writeln(s string) {
-	ss := s + '\n'
-	ret := C.write(f.fd, ss.str, s.len + 1)
-	if ret == -1 {
-		C.perror('failed to write')
-	}
-}
-
-pub fn (f File) close() {
-	C.close(f.fd)
-}

vlib/os2/os2_test.v

@@ -1,11 +0,0 @@
-// import os2
-
-fn test_open() {
-	/*
-	$if macos {
-		f := os2.create('os2.test')
-		f.writeln('hello world!')
-		f.close()
-	}
-	*/
-}