refactor: only pypy3.8 windows didn't have os.getppid?

Author: nedbat

coverage/debug.py

@@ -380,9 +380,8 @@ def filter(self, text: str) -> str:
             welcome = (
                 f"New process: {pid=}, executable: {sys.executable!r}\n"
                 + f"New process: cmd: {argv!r}\n"
+                + f"New process parent pid: {os.getppid()!r}\n"
             )
-            if hasattr(os, "getppid"):
-                welcome += f"New process parent pid: {os.getppid()!r}\n"
 
         if welcome:
             self.did_welcome = True