Removed temperature check

Co-authored-by: James Dark <65899899+jhdark@users.noreply.github.com>

festim/hydrogen_transport_problem.py

@@ -195,7 +195,7 @@ def define_temperature(self):
         # if temperature is callable, process accordingly
         elif callable(self.temperature):
             arguments = self.temperature.__code__.co_varnames
-            if "t" in arguments and "x" not in arguments and "T" not in arguments:
+            if "t" in arguments and "x" not in arguments:
                 if not isinstance(self.temperature(t=float(self.t)), (float, int)):
                     raise ValueError(
                         f"self.temperature should return a float or an int, not {type(self.temperature(t=float(self.t)))} "