Revert accidental inclusion of work from separate branch

Author: softwareengineerprogrammer

src/geophires_x/SurfacePlant.py

@@ -234,7 +234,6 @@ def __init__(self, model: Model):
             "End-Use Option",
             value=EndUseOptions.ELECTRICITY,
             AllowableRange=[1, 2, 31, 32, 41, 42, 51, 52],
-            values_enum=EndUseOptions,
             UnitType=Units.NONE,
             ErrMessage="assume default end-use option (1: electricity only)",
             ToolTipText="Select the end-use application of the geofluid heat: " +