Remove redundant comments

Library/Homebrew/formula.rb

@@ -473,12 +473,10 @@ class Formula
 
   end
 
-  # For brew-fetch and others.
   def fetch
     active_spec.fetch
   end
 
-  # For FormulaInstaller.
   def verify_download_integrity fn
     active_spec.verify_download_integrity(fn)
   end

Library/Homebrew/resource.rb

@@ -77,7 +77,6 @@ class Resource
     Partial.new(self, files)
   end
 
-  # For brew-fetch and others.
   def fetch
     # Ensure the cache exists
     HOMEBREW_CACHE.mkpath