remove copied EquityOrderBuilder warnings (#125)

schwab/orders/__init__.py

@@ -4,22 +4,3 @@
 from . import equities
 from . import generic
 from . import options
-
-import sys
-assert sys.version_info[0] >= 3
-
-__error_message = (
-        'EquityOrderBuilder has been deleted from the library. Please use ' +
-        'OrderBuilder and its associated templates instead. See here for ' +
-        'details: https://tda-api.readthedocs.io/en/latest/' +
-        'order-templates.html#what-happened-to-equityorderbuilder')
-
-if sys.version_info[1] >= 7:
-    def __getattr__(name):
-        if name == 'EquityOrderBuilder':
-            raise ImportError(__error_message)
-        raise AttributeError(name)
-else:  # pragma: no cover
-    class EquityOrderBuilder:
-        def __init__(self, *args, **kwargs):
-            raise NotImplementedError(globals()['__error_message'])