do not globally disable rubocop rules

lib/chronic_duration.rb

@@ -28,8 +28,6 @@
 # Changes to this file should be kept in sync with
 # frontend/src/app/shared/helpers/chronic_duration.js.
 
-# rubocop:disable Metrics/AbcSize
-# rubocop:disable Metrics/PerceivedComplexity
 module ChronicDuration
   extend self
 
@@ -81,7 +79,7 @@ module ChronicDuration
   # Given an integer and an optional format,
   # returns a formatted string representing elapsed time
   # rubocop:disable Lint/UselessAssignment
-  def output(seconds, opts = {})
+  def output(seconds, opts = {}) # rubocop:disable Metrics/AbcSize, Metrics/PerceivedComplexity
     int = seconds.to_i
     seconds = int if seconds - int == 0 # if seconds end with .0
 
@@ -286,7 +284,7 @@ module ChronicDuration
   end
 
   # Parse 3:41:59 and return 3 hours 41 minutes 59 seconds
-  def filter_by_type(string)
+  def filter_by_type(string) # rubocop:disable Metrics/AbcSize
     chrono_units_list = duration_units_list.reject { |v| v == "weeks" }
 
     if string.delete(" ")&.match?(time_matcher)
@@ -313,7 +311,7 @@ module ChronicDuration
 
   # Get rid of unknown words and map found
   # words to defined time units
-  def filter_through_white_list(string, opts)
+  def filter_through_white_list(string, opts) # rubocop:disable Metrics/AbcSize, Metrics/PerceivedComplexity
     res = []
     string.split.each do |word|
       if word&.match?(float_matcher)
@@ -374,5 +372,3 @@ module ChronicDuration
     %w[and with plus]
   end
 end
-# rubocop:enable Metrics/AbcSize
-# rubocop:enable Metrics/PerceivedComplexity