Removed trainer, and fixed opt_mask annotations

Author: ipcamit

kliff/models/parameter.py

@@ -80,7 +80,7 @@ def __new__(
         transform_function: "ParameterTransform" = None,
         bounds: np.ndarray = None,
         index: int = None,
-        opt_mask: np.ndarray = None,
+        opt_mask: [np.ndarray, bool] = None,
     ):
         """Initializes and returns a new instance of Parameter.