Remove pycompile check for building packages

tools/build_release

@@ -4,7 +4,7 b''
 import os
 from shutil import rmtree
 
-from toollib import sh, pjoin, get_ipdir, cd, compile_tree, execfile, sdists, buildwheels
+from toollib import sh, pjoin, get_ipdir, cd, execfile, sdists, buildwheels
 
 def build_release():
 
@@ -15,9 +15,6 b' def build_release():'
     # Load release info
     execfile(pjoin('IPython', 'core', 'release.py'), globals())
 
-    # Check that everything compiles
-    compile_tree('*')
-
     # Cleanup
     for d in ['build', 'dist', pjoin('docs', 'build'), pjoin('docs', 'dist'),
               pjoin('docs', 'source', 'api', 'generated')]:

tools/toollib.py

@@ -49,15 +49,6 b' def get_ipdir():'
         raise SystemExit('Invalid ipython directory: %s' % ipdir)
     return ipdir
 
-
-def compile_tree(folder='.'):
-    """Compile all Python files below current directory."""
-    stat = os.system('python -m compileall {}'.format(folder))
-    if stat:
-        msg = '*** ERROR: Some Python files in tree do NOT compile! ***\n'
-        msg += 'See messages above for the actual file that produced it.\n'
-        raise SystemExit(msg)
-
 try:
     execfile = execfile
 except NameError: