yet another markmin improvement, thanks Vladyslav

gluon/compileapp.py

@@ -40,18 +40,15 @@ import imp
 import logging
 logger = logging.getLogger("web2py")
 import rewrite
-import platform
 
 try:
     import py_compile
 except:
     logger.warning('unable to import py_compile')
 
-is_pypy = hasattr(platform,'python_implementation') and \
-    platform.python_implementation() == 'PyPy'
-settings.global_settings.is_pypy = is_pypy
-is_gae = settings.global_settings.web2py_runtime_gae
-is_jython = settings.global_settings.is_jython = 'java' in sys.platform.lower() or hasattr(sys, 'JYTHON_JAR') or str(sys.copyright).find('Jython') > 0
+is_pypy = settings.global_settings.is_pypy
+is_gae  = settings.global_settings.web2py_runtime_gae
+is_jython = settings.global_settings.is_jython
 
 TEST_CODE = \
     r"""