refactor: linting

app/controllers/locations_controller.rb

@@ -121,10 +121,8 @@ class LocationsController < ApplicationController
     day = location_params["startdate(3i)"]
     month = location_params["startdate(2i)"]
     year = location_params["startdate(1i)"]
-    if [day, month, year].none?(&:blank?) && Date.valid_date?(year.to_i, month.to_i, day.to_i)
-      @location.startdate = Time.zone.local(year.to_i, month.to_i, day.to_i)
-    else
-      @location.startdate = nil
+    @location.startdate = if [day, month, year].none?(&:blank?) && Date.valid_date?(year.to_i, month.to_i, day.to_i)
+                            Time.zone.local(year.to_i, month.to_i, day.to_i)
                           end
     if @location.save(context: :startdate)
       redirect_to scheme_location_check_answers_path(@scheme, @location, route: params[:route])