fix condition

Author: chenmoneygithub

dspy/predict/predict.py

@@ -68,7 +68,7 @@ def load_state(self, state, use_legacy_loading=False):
         if use_legacy_loading:
             self._load_state_legacy(state)
             return
-        if "signature" not in state and ("signature_instructions" in state or "signature_prefix" in state):
+        if "signature" not in state:
             # Check if the state is from a version of DSPy prior to v2.5.3.
             raise ValueError(
                 "The saved state is from a version of DSPy prior to v2.5.3. Please use `use_legacy_loading=True` to "