revert: add warning when over-defining parameters

src/tensorwaves/model.py

@@ -5,6 +5,7 @@
 as `sympy` expressions only.
 """
 
+import logging
 from typing import Callable, Dict, FrozenSet, Mapping, Tuple, Union
 
 import numpy as np
@@ -109,6 +110,13 @@ def __init__(
         if not all(map(lambda p: isinstance(p, sp.Symbol), parameters)):
             raise TypeError(f"Not all parameters are of type {sp.Symbol}")
 
+        if not set(parameters) <= set(expression.free_symbols):
+            unused_parameters = set(parameters) - set(expression.free_symbols)
+            logging.warning(
+                f"Parameters {unused_parameters} are defined but do not appear"
+                " in the model!"
+            )
+
     def lambdify(self, backend: Union[str, tuple, dict]) -> Callable:
         """Lambdify the model using `~sympy.utilities.lambdify.lambdify`."""
         # pylint: disable=import-outside-toplevel