ToggleFetcher code clean up

lib/unleash/toggle_fetcher.rb

@@ -23,7 +23,7 @@ def initialize
         read!
       end
 
-      # once we have initialized, somewhere else you will want to start a loop with fetch()
+      # once initialized, somewhere else you will want to start a loop with fetch()
     end
 
     def toggles
@@ -35,7 +35,7 @@ def toggles
     end
 
     # rename to refresh_from_server!  ??
-    # TODO: should simplify by moving uri / http initialization to class initialization
+    # TODO: should simplify by moving uri / http initialization to elsewhere
     def fetch
       Unleash.logger.debug "fetch()"
       Unleash.logger.debug "ETag: #{self.etag}" unless self.etag.nil?
@@ -99,10 +99,6 @@ def update_client!
       end
     end
 
-    def backup_file_exists?
-      File.exists?(backup_file)
-    end
-
     def save!
       begin
         backup_file = Unleash.configuration.backup_file
@@ -125,7 +121,7 @@ def save!
 
     def read!
       Unleash.logger.debug "read!()"
-      return nil unless File.exists?(Unleash.configuration.backup_file)
+      return nil unless File.exist?(Unleash.configuration.backup_file)
 
       begin
         file = File.open(Unleash.configuration.backup_file, "r")