Resolved many Rubocop warnings

Data/Scripts/013_Overworld/015_PField_Time.rb

@@ -72,7 +72,7 @@ module PBDayNight
   def self.getShade
     time = pbGetDayNightMinutes
     time = (24*60)-time if time>(12*60)
-    shade=255*time/(12*60)
+    return 255*time/(12*60)
   end
 
 # Gets a Tone object representing a suggested shading
@@ -97,7 +97,7 @@ module PBDayNight
 
 # Internal function
 
-  def self.getToneInternal
+  def getToneInternal
     # Calculates the tone for the current frame, used for day/night effects
     realMinutes = pbGetDayNightMinutes
     hour   = realMinutes/60