remove bootstrap-flex update handling since it's gone

tasks/updater/scss.rb

@@ -12,16 +12,14 @@ def update_scss_assets
       log_processed "#{bootstrap_scss_files * ' '}"
 
       log_status 'Updating scss main files'
-      %w(bootstrap bootstrap-flex bootstrap-grid bootstrap-reboot).each do |name|
+      %w(bootstrap bootstrap-grid bootstrap-reboot).each do |name|
         # Compass treats non-partials as targets to copy into the main project, so make them partials.
         # Also move them up a level to clearly indicate entry points.
         from = "#{save_to}/#{name}.scss"
         to   = "#{save_to}/../_#{name}.scss"
         FileUtils.mv from, to
-        # As we moved the files, adjust imports accordingly (except for bootstrap-flex that imports the main bootstrap).
-        unless 'bootstrap-flex' == name
-          File.write to, File.read(to).gsub(/ "/, ' "bootstrap/')
-        end
+        # As we moved the files, adjust imports accordingly.
+        File.write to, File.read(to).gsub(/ "/, ' "bootstrap/')
       end
 
       log_status 'Generating variable template file'