Remove obsolete fixapplepython23 script and PythonSystemFixes
installer package from the OS X Makefile for Python 3.  It has
never worked on Python 3 and is not needed there as pre-10.3.9
installs are no longer supported.
diff --git a/Mac/BuildScript/build-installer.py b/Mac/BuildScript/build-installer.py
index 0bf2100..9f8d025 100755
--- a/Mac/BuildScript/build-installer.py
+++ b/Mac/BuildScript/build-installer.py
@@ -361,7 +361,7 @@
         ),
     ]
 
-    if DEPTARGET < '10.4':
+    if DEPTARGET < '10.4' and not PYTHON_3:
         result.append(
             dict(
                 name="PythonSystemFixes",