Fix compiler warnings

src/CFG/Sanitize.hs

@@ -6,8 +6,6 @@ module CFG.Sanitize
   ) where
 
 import           Data.Char
-import           Data.List
-import           Data.Maybe
 import           Data.Monoid
 import qualified Data.Text as T
 

src/Search/Search2.hs

@@ -164,7 +164,7 @@ parseLine handle = do
         Nothing -> error $ "Parser error in line " <> T.unpack line
         Just (DecisionRequest num) ->
           return $ Decision num
-        Just (BeforeSyscall state call func) ->
+        Just (BeforeSyscall _ call _) ->
           return $ Syscall call
         Just (AtBasicBlock state abb func) ->
           return $ NewVertex (Vertex state abb func)