Update testsuite

Remove platform specific check.

Author: vladimyr

test/os/process/cwd.wren

@@ -3,6 +3,5 @@ import "os" for Process
 
 System.print(Process.cwd is String) // expect: true
 System.print(!Process.cwd.isEmpty) // expect: true
-System.print(Process.cwd.startsWith("/")) // expect: true
 System.print(File.realPath(Process.cwd) == Process.cwd) // expect: true
 System.print(Directory.exists(Process.cwd)) // expect: true