perf: Remove dead 'values = []' assignment in DesTupleType.deserialize

The 'values' list was allocated but never used — the method builds
results directly into a pre-allocated tuple via tuple_set(res, i, item).
Removes one unnecessary list allocation per tuple deserialization.

Author: mykaul

cassandra/deserializers.pyx

@@ -560,7 +560,6 @@ cdef class DesTupleType(_DesParameterizedType):
         protocol_version = max(3, protocol_version)
 
         p = 0
-        values = []
         for i in range(self.subtypes_len):
             item = None
             if p + 4 <= buf.size: