removed CustomImporter

Author: Kareem Zidane

src/cs50/__init__.py

@@ -1,28 +1,6 @@
 import os
 import sys
 
-
-class CustomImporter(object):
-    """
-    Import cs50.SQL lazily for performance (and so that rest of library can be used without SQLAlchemy installed).
-    https://docs.python.org/3/library/imp.html
-    http://xion.org.pl/2012/05/06/hacking-python-imports/
-    http://dangerontheranger.blogspot.com/2012/07/how-to-use-sysmetapath-with-python.html
-    """
-
-    def find_module(self, fullname, path=None):
-        if fullname == "cs50.SQL":
-            return self
-        return None
-
-    def load_module(self, name):
-        if name in sys.modules:
-            return sys.modules[name]
-        from .sql import SQL
-        sys.modules[name] = SQL
-        return SQL
-
-
 try:
 
     # Save student's sys.path
@@ -41,8 +19,8 @@ def load_module(self, name):
     # Replace Flask's logger
     from . import flask
 
-    # Lazily load CS50.SQL
-    sys.meta_path.append(CustomImporter())
+    # Wrap SQLAlchemy
+    from .sql import SQL
 
 finally: