caveats, keg: remove linkapps caveats code.

Library/Homebrew/caveats.rb

@@ -23,7 +23,6 @@ class Caveats
     caveats << fish_function_caveats
     caveats << plist_caveats
     caveats << python_caveats
-    caveats << app_caveats
     caveats << elisp_caveats
     caveats.compact.join("\n")
   end
@@ -169,16 +168,6 @@ class Caveats
     s
   end
 
-  def app_caveats
-    return unless keg
-    return unless keg.app_installed?
-
-    <<-EOS.undent
-      .app bundles were installed.
-      Run `brew linkapps #{keg.name}` to symlink these to /Applications.
-    EOS
-  end
-
   def elisp_caveats
     return if f.keg_only?
     return unless keg

Library/Homebrew/keg.rb

@@ -367,10 +367,6 @@ class Keg
     Pathname.glob("#{app_prefix}/{,libexec/}*.app")
   end
 
-  def app_installed?
-    !apps.empty?
-  end
-
   def elisp_installed?
     return false unless (path/"share/emacs/site-lisp"/name).exist?
     (path/"share/emacs/site-lisp"/name).children.any? { |f| %w[.el .elc].include? f.extname }