Code cleanup.

lib/time_calculation.rb

@@ -32,11 +32,7 @@ module TimeCalculation
   end
 
   def self.dest_time(start_time, diff_in_min)
-    start_time_string = start_time.to_s
-    if start_time.to_s != /UTC/
-      start_time_string +=  ' UTC'
-    end
-    start_time = Time.parse( start_time_string )
+    start_time = Time.parse( start_time.to_s + ' UTC' )
     dest_time = diff_in_min.round.business_minute.after( start_time )
     return dest_time
   end