Fix build of assistant without yesod.

Assistant/Alert.hs

@@ -18,7 +18,6 @@ import qualified Data.Text as T
 import Data.Text (Text)
 import qualified Data.Map as M
 import Data.String
-import Yesod
 
 {- Different classes of alerts are displayed differently. -}
 data AlertClass = Success | Message | Activity | Warning | Error
@@ -57,17 +56,6 @@ data Alert = Alert
 
 data AlertIcon = ActivityIcon | SuccessIcon | ErrorIcon | InfoIcon | TheCloud
 
-htmlIcon :: AlertIcon -> GWidget sub master ()
-htmlIcon ActivityIcon = bootStrapIcon "refresh"
-htmlIcon InfoIcon = bootStrapIcon "info-sign"
-htmlIcon SuccessIcon = bootStrapIcon "ok"
-htmlIcon ErrorIcon = bootStrapIcon "exclamation-sign"
--- utf-8 umbrella (utf-8 cloud looks too stormy)
-htmlIcon TheCloud = [whamlet|☂|]
-
-bootStrapIcon :: Text -> GWidget sub master ()
-bootStrapIcon name = [whamlet|<i .icon-#{name}></i>|]
-
 {- When clicked, a button always redirects to a URL
  - It may also run an IO action in the background, which is useful
  - to make the button close or otherwise change the alert. -}