BoundaryConditions: delete setter/getter duplicated for d50 and sigma

src/Model/BoundaryCondition/BoundaryCondition.py

@@ -514,42 +514,6 @@ class BoundaryCondition(SQLSubModel):
         self._sigma = float(value)
         self.modified()
 
-    @property
-    def d50(self):
-        return self._d50
-
-    @d50.setter
-    def d50(self, value):
-        self._d50 = float(value)
-        self.modified()
-
-    @property
-    def sigma(self):
-        return self._sigma
-
-    @sigma.setter
-    def sigma(self, value):
-        self._sigma = float(value)
-        self.modified()
-
-    @property
-    def d50(self):
-        return self._d50
-
-    @d50.setter
-    def d50(self, value):
-        self._d50 = float(value)
-        self.modified()
-
-    @property
-    def sigma(self):
-        return self._sigma
-
-    @sigma.setter
-    def sigma(self, value):
-        self._sigma = float(value)
-        self.modified()
-
     @property
     def header(self):
         return self._header.copy()