Convert 'else next' to guard clause

app/models/derived_variables/lettings_log_variables.rb

@@ -352,15 +352,13 @@ private
   def reset_partner_fields!
     person_count = hhmemb || 8
     (2..person_count).each do |i|
-      if send("relat#{i}_changed?") && send("relat#{i}_was") == "P"
+      next unless send("relat#{i}_changed?") && send("relat#{i}_was") == "P"
+
       ((i + 1)..person_count).each do |j|
         if self["relat#{j}"] == "X"
           self["relat#{j}"] = nil
         end
       end
-      else
-        next
-      end
     end
   end