Remove sassc and slim dependencies

Gemfile

@@ -10,8 +10,6 @@ gem 'mini_racer'
 gem 'nanoc'
 gem 'pdfkit'
 gem 'sass'
-gem 'sassc'
-gem 'slim'
 gem 'nokogiri'
 
 group :nanoc do

Gemfile.lock

@@ -122,16 +122,9 @@ GEM
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    sassc (2.4.0)
-      ffi (~> 1.9)
     shellany (0.0.1)
-    slim (4.1.0)
-      temple (>= 0.7.6, < 0.9)
-      tilt (>= 2.0.6, < 2.1)
     slow_enumerator_tools (1.1.0)
-    temple (0.8.2)
     thor (1.0.1)
-    tilt (2.0.10)
     tomlrb (1.3.0)
     tty-color (0.5.2)
     tty-command (0.9.0)
@@ -156,8 +149,6 @@ DEPENDENCIES
   nokogiri
   pdfkit
   sass
-  sassc
-  slim
 
 BUNDLED WITH
    2.1.4