remove replacement of % with %% in bytes types

Author: atkincaid74

sqlalchemy_bigquery/base.py

@@ -679,7 +679,7 @@ def literal_processor(self, dialect):
 class BQBinary(sqlalchemy.sql.sqltypes._Binary):
     @staticmethod
     def __process_bytes_literal(value):
-        return repr(value.replace(b"%", b"%%"))
+        return repr(value)
 
     def literal_processor(self, dialect):
         return self.__process_bytes_literal