Remove useless code

`to_unicode` variable was created but was not used.
(cherry picked from commit 69fcabb335130bd0f6e9889c5b191c68192559b5)

diff --git a/lib/sqlalchemy/sql/sqltypes.py b/lib/sqlalchemy/sql/sqltypes.py
index a13daf2a7efeeaa5e17d8410b5bcc0f0c6122c04..fbf3f613ebde0772a47155dac6e6da51644c0185 100644 (file)
--- a/lib/sqlalchemy/sql/sqltypes.py
+++ b/lib/sqlalchemy/sql/sqltypes.py
@@ -212,9 +212,6 @@ class String(Concatenable, TypeEngine):
             self.convert_unicode != 'force_nocheck'
         )
         if needs_convert:
-            to_unicode = processors.to_unicode_processor_factory(
-                dialect.encoding, self.unicode_error)
-
             if needs_isinstance:
                 return processors.to_conditional_unicode_processor_factory(
                     dialect.encoding, self.unicode_error)