Don't re-define pid_t on Windows

tkrasnukha · tkrasnukha · commit 86e0bc28db82 · 2021-09-21T14:48:32.000+03:00
Since #74 pid_t is always defined on Windows.
diff --git a/src/Platform.h b/src/Platform.h
@@ -48,10 +48,6 @@ struct termios {
   speed_t c_ospeed; // output speed
 };
 
-#if !defined(__MINGW32__) || !defined(_PID_T_) || defined(NO_OLDNAMES)
-typedef long pid_t;
-#endif
-
 #define STDIN_FILENO 0
 #ifndef PATH_MAX
 #define PATH_MAX 32768
