Removed sassc tool components

Dockerfile

@@ -41,7 +41,6 @@ RUN apt-get update && apt-get install -y \
     graphviz \
     gnuplot \
     rsync \
-    sassc \
     unzip \
     zip
 

app/Decker.hs

@@ -186,13 +186,6 @@ main = do
         pdflatex ["-output-directory", dir, src]
         pdf2svg [pdf, out]
         liftIO $ removeFile pdf
-    priority 2 $
-      "//*.css" %> \out -> do
-        let src = out -<.> ".scss"
-        exists <- doesFileExist src
-        when exists $ do
-          need [src]
-          sassc [src, out]
     --
     phony "clean" $ do
       removeFilesAfter publicDir ["//"]

readme.md

@@ -37,7 +37,6 @@ Decker uses a few external tools that need to be installed on the system:
 -   [*Gnuplot*](http://gnuplot.sourceforge.net) to generate graphs using `dot`
 -   [*pdf2svg*](https://github.com/dawbarton/pdf2svg) to generate SVG files from
     PDF documents
--   [*sassc*](https://github.com/sass/sassc) to compile SCSS to CSS
 -   *libbzip2-dev*
 -   [*NodeJS*](https://nodejs.org/) as a prerequisite for Yarn
 -   [*Yarn*](https://yarnpkg.com) to install Javascript dependencies
@@ -47,7 +46,7 @@ Decker uses a few external tools that need to be installed on the system:
 Use [Homebrew](https://brew.sh) to install most of them.
 
 ``` {.sh}
-brew install rsync unzip graphviz gnuplot pdf2svg sassc yarn
+brew install rsync unzip graphviz gnuplot pdf2svg yarn
 ```
 
 For the rest follow instructions on their respective webites.

src/External.hs

@@ -8,7 +8,6 @@ module External
   , pdflatex
   , pdf2svg
   , decktape
-  , sassc
   , checkExternalPrograms
   ) where
 
@@ -93,13 +92,6 @@ programs =
         []
         (helpText
            "Decktape PDF exporter (https://github.com/astefanutti/decktape)"))
-  , ( "sassc"
-    , ExternalProgram
-        []
-        "sassc"
-        ["--style", "nested"]
-        ["-v"]
-        (helpText "LibSass wrapper (https://github.com/sass/sassc)"))
   ]
 
 type Program = [String] -> Action ()
@@ -128,9 +120,6 @@ pdf2svg = makeProgram "pdf2svg"
 decktape :: Program
 decktape = makeProgram "decktape"
 
-sassc :: Program
-sassc = makeProgram "sassc"
-
 helpText :: String -> String
 helpText name =
   "The " ++