removed code that generates confusing and mistaken import error

message when the import error raises inside scrapy_settings.

--HG--
extra : convert_revision : svn%3Ab85faa78-f9eb-468e-a121-7cced6da292c%40119

scrapy/trunk/scrapy/conf/__init__.py

@@ -20,13 +20,7 @@ class Settings(object):
         self.core = self._import('scrapy.conf.core_settings')
 
     def _import(self, modulepath):
-        try:
-            return __import__(modulepath, {}, {}, [''])
-        except ImportError:
-            import sys
-            err = "Error: Can't find %s module in your python path\n"
-            sys.stderr.write(err % modulepath)
-            sys.exit(1)
+        return __import__(modulepath, {}, {}, [''])
 
     def __getitem__(self, opt_name):
         if opt_name in self.overrides: