[RM-8476] [parameters checker] wrong warning: Unused parameter LSF GaussianVariablewidthFileName

Created on 2023-11-13 12:10:58 by Didier Vibert. % Done: 0

with

<pre>
"LSF":

{ "LSFType": "GaussianVariableWidth", "GaussianVariablewidthFileName": "LSF/roman_grism_lsf.fits" }

,
</pre>

we get the warning "Unused parameter LSF GaussianVariablewidthFileName"