always use a subprocess to find the file to delete

Author: nedbat

igor.py

@@ -65,7 +65,7 @@ def remove_extension(core, *args):
         tracer.*.pyd
         """.split()
 
-    if "--from-install" in args:
+    if 1:  #  "--from-install" in args:
         # Get the install location using a subprocess to avoid
         # locking the file we are about to delete
         root = os.path.dirname(