Remove unused parameter in barcode.get()

Fixes #68

Author: Hugo Osvaldo Barrera

barcode/__init__.py

@@ -37,7 +37,7 @@
 PROVIDED_BARCODES.sort()
 
 
-def get(name, code=None, writer=None, options=None, writer_options=None):
+def get(name, code=None, writer=None, options=None):
     """Helper method for getting a generator or even a generated code.
 
     :param str name: The name of the type of barcode desired.