remove irrelevant comments

+ improve error message 'can not convert %r to float'
Change-Id: Idf534a4105086463fd238d7c91317424a809d7ba

Change-Id: I09260dda8deff1e6ee0af2fa38a42a09884a2061
Reviewed-on: https://forge.frm2.tum.de/review/c/sine2020/secop/playground/+/26345
Tested-by: Jenkins Automated Tests <pedersen+jenkins@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>

secop/datatypes.py

@@ -194,7 +194,7 @@ class FloatRange(DataType):
         try:
             value = float(value)
         except Exception:
-            raise BadValueError('Can not __call__ %r to float' % value) from None
+            raise BadValueError('Can not convert %r to float' % value) from None
         # map +/-infty to +/-max possible number
         value = clamp(-sys.float_info.max, value, sys.float_info.max)