Revert "X.U.Grab: Hide mkGrabs from XMonad"

Now that we require xmonad 0.18.0, this is no longer needed.

This reverts commit 0934fe5.

Author: liskin

Diff for: XMonad/Util/Grab.hs

@@ -29,7 +29,7 @@ module XMonad.Util.Grab
   ) where
 
 -- core
-import           XMonad                         hiding (mkGrabs)
+import           XMonad
 
 import           Control.Monad                  ( when )
 import           Data.Bits                      ( setBit )

Diff for: xmonad-contrib.cabal

@@ -76,7 +76,7 @@ library
     ghc-options:   -Wall -Wno-unused-do-bind
 
     if flag(pedantic)
-       ghc-options: -Werror -Wwarn=deprecations -Wwarn=dodgy-imports
+       ghc-options: -Werror -Wwarn=deprecations
 
     -- Keep this in sync with the oldest version in 'tested-with'
     if impl(ghc > 8.6.5)
@@ -496,7 +496,7 @@ test-suite tests
   default-language: Haskell2010
 
   if flag(pedantic)
-     ghc-options: -Werror -Wwarn=deprecations -Wwarn=dodgy-imports
+     ghc-options: -Werror -Wwarn=deprecations
 
   -- Keep this in sync with the oldest version in 'tested-with'
   if impl(ghc > 8.6.5)