Remove HTTP connection manager, it's not being used

I suppose there's no performance difference in using one, but it requires
`http-conduit` as a build dependency, so potentially we may be reducing build
time by removing unnecessary deps.

src/Vervis/Application.hs

@@ -89,7 +89,7 @@ makeFoundation :: AppSettings -> IO App
 makeFoundation appSettings = do
     -- Some basic initializations: HTTP connection manager, logger, and static
     -- subsite.
-    appHttpManager <- newManager
+    --appHttpManager <- newManager tlsManagerSettings
     appLogger <- newStdoutLoggerSet defaultBufSize >>= makeYesodLogger
     appStatic <-
         (if appMutableStatic appSettings then staticDevel else static)

src/Vervis/Foundation.hs

@@ -59,7 +59,7 @@ data App = App
     { appSettings    :: AppSettings
     , appStatic      :: Static -- ^ Settings for static file serving.
     , appConnPool    :: ConnectionPool -- ^ Database connection pool.
-    , appHttpManager :: Manager
+    --, appHttpManager :: Manager
     , appLogger      :: Logger
     , appMailQueue   :: Maybe (Chan (MailRecipe App))
     , appSvgFont     :: PreparedFont Double
@@ -443,7 +443,7 @@ instance YesodAuth App where
     -- You can add other plugins like BrowserID, email or OAuth here
     authPlugins _ = [accountPlugin]
 
-    authHttpManager = getsYesod getHttpManager
+    authHttpManager = error "authHttpManager"
 
     onLogout = clearUnverifiedCreds False
 
@@ -529,8 +529,8 @@ instance RenderMessage App FormMessage where
 -- An example is background jobs that send email.
 -- This can also be useful for writing code that works across multiple Yesod
 -- applications.
-instance HasHttpManager App where
+--instance HasHttpManager App where
-    getHttpManager = appHttpManager
+--    getHttpManager = appHttpManager
 
 unsafeHandler :: App -> Handler a -> IO a
 unsafeHandler = Unsafe.fakeHandlerGetLogger appLogger

src/Vervis/Import/NoFoundation.hs

@@ -21,7 +21,7 @@ import Database.Persist.Sql        as Import ( SqlBackend
                                              , SqlPersistT
                                              , runMigration
                                              )
-import Network.HTTP.Client.Conduit as Import
+--import Network.HTTP.Client.Conduit as Import
 import Network.HTTP.Types          as Import
 import Yesod                       as Import hiding (Header, parseTime)
 import Yesod.Auth                  as Import

vervis.cabal

@@ -263,7 +263,6 @@ library
                      --, hjsmin
                      -- 'git' uses it for 'GitTime'
                      , hourglass
-                     , http-conduit
                      , http-types
                      , libravatar
                        -- for converting Darcs patch hash Digest to ByteString