Drop all local color method calls

- The central logging method decides the color of the output
  - pass Rubocop complaints

lib/github_changelog_generator/generator/generator_fetcher.rb

@@ -74,7 +74,7 @@ module GitHubChangelogGenerator
           commit = @fetcher.fetch_commit(event)
           issue[:actual_date] = commit[:author][:date]
         rescue
-          puts "Warning: Can't fetch commit #{event[:commit_id]}. It is probably referenced from another repo.".color(:yellow)
+          puts "Warning: Can't fetch commit #{event[:commit_id]}. It is probably referenced from another repo."
           issue[:actual_date] = issue[:closed_at]
         end
       end

lib/github_changelog_generator/generator/generator_generation.rb

@@ -39,10 +39,10 @@ module GitHubChangelogGenerator
           index2 = hash[tag2]
           log += generate_log_between_tags(all_tags[index1], all_tags[index2])
         else
-          raise ChangelogGeneratorError, "Can't find tag #{tag2} -> exit".color(:red)
+          raise ChangelogGeneratorError, "Can't find tag #{tag2} -> exit"
         end
       else
-        raise ChangelogGeneratorError, "Can't find tag #{tag1} -> exit".color(:red)
+        raise ChangelogGeneratorError, "Can't find tag #{tag1} -> exit"
       end
       log
     end
@@ -141,7 +141,7 @@ module GitHubChangelogGenerator
       (1...filtered_tags.size).each do |index|
         log += generate_log_between_tags(filtered_tags[index], filtered_tags[index - 1])
       end
-      if @filtered_tags.count != 0
+      if filtered_tags.any?
         log += generate_log_between_tags(nil, filtered_tags.last)
       end
 

lib/github_changelog_generator/generator/generator_tags.rb

@@ -19,7 +19,7 @@ module GitHubChangelogGenerator
     # @param [Hash] tag_name name of the tag
     # @return [Time] time of specified tag
     def get_time_of_tag(tag_name)
-      raise ChangelogGeneratorError, "tag_name is nil".color(:red) if tag_name.nil?
+      raise ChangelogGeneratorError, "tag_name is nil" if tag_name.nil?
 
       name_of_tag = tag_name["name"]
       time_for_name = @tag_times_hash[name_of_tag]
@@ -99,7 +99,7 @@ module GitHubChangelogGenerator
       filtered_tags = all_tags
       tag = @options[:due_tag]
       if tag
-        if (all_tags.count > 0) && (all_tags.map(&:name).include? tag)
+        if all_tags.any? && all_tags.map(&:name).include?(tag)
           idx = all_tags.index { |t| t.name == tag }
           last_index = all_tags.count - 1
           filtered_tags = if idx > 0 && idx < last_index