Apply Style/SymbolProc rubocop rule

This style is much more concise.

lib/manager_authenticator.rb

@@ -4,7 +4,7 @@ class ManagerAuthenticator
   end
 
   def auth
-    return false unless [@manager[:login], @manager[:user_key], @manager[:date]].all? { |manager| manager.present? }
+    return false unless [@manager[:login], @manager[:user_key], @manager[:date]].all?(&:present?)
     return @manager if manager_exists? && application_authorized?
 
     false

lib/remote_census_api.rb

@@ -66,7 +66,7 @@ class RemoteCensusApi
     end
 
     def parse_response_path(path_value)
-      path_value.split(".").map { |section| section.to_sym } if path_value.present?
+      path_value.split(".").map(&:to_sym) if path_value.present?
     end
   end
 

lib/remote_translations/microsoft/available_locales.rb

@@ -6,7 +6,7 @@ require "json"
 class RemoteTranslations::Microsoft::AvailableLocales
   def self.available_locales
     daily_cache("locales") do
-      remote_available_locales.map { |locale| locale.first }
+      remote_available_locales.map(&:first)
     end
   end