Remove unavailable brew casks

Issue sb2nov#256

Author: simeg

Homebrew/Cask.md

@@ -49,24 +49,19 @@ Here are some useful apps that are available on Cask.
 $ brew cask install \
     alfred \
     android-file-transfer \
-    asepsis \
     appcleaner \
     caffeine \
     cheatsheet \
     docker \
     doubletwist \
     dropbox \
     google-chrome \
-    google-drive \
     google-hangouts \
     flux \
-    latexian \
     1password \
-    pdftk \
     spectacle \
     sublime-text \
     superduper \
-    totalfinder \
     transmission \
     valentina-studio \
     vlc