Follow Rubocop for scripts/prune-old-flaky-specs

scripts/prune-old-flaky-specs

@@ -5,8 +5,9 @@
 # gem manually on the CI
 require 'rubygems'
 
-singleton_class.__send__(:alias_method, :require_dependency, :require)
-$LOAD_PATH.unshift(File.expand_path('../lib', __dir__))
+# In newer Ruby, alias_method is not private then we don't need __send__
+singleton_class.__send__(:alias_method, :require_dependency, :require) # rubocop:disable GitlabSecurity/PublicSend
+$:.unshift(File.expand_path('../lib', __dir__))
 
 require 'rspec_flaky/report'