Don't print the number of deps in count-deps tests

It is redundant information and a source of needless version control
conflicts when multiple MRs are changing the deps list.

Just printing the list and not also its length is fine.

testsuite/tests/count-deps/CountDepsAst.stdout

-Found 287 Language.Haskell.Syntax module dependencies
+Found Language.Haskell.Syntax module dependencies
 GHC.Builtin.Names
 GHC.Builtin.PrimOps
 GHC.Builtin.PrimOps.Ids

testsuite/tests/count-deps/CountDepsParser.stdout

-Found 294 GHC.Parser module dependencies
+Found GHC.Parser module dependencies
 GHC.Builtin.Names
 GHC.Builtin.PrimOps
 GHC.Builtin.PrimOps.Ids

utils/count-deps/Main.hs

@@ -40,8 +40,7 @@ printDeps libdir modName dot = do
   if not dot then
     do
       let modules = Map.keys modGraph
-          num = length modules
-      putStrLn $ "Found " ++ show num ++ " " ++ modName ++ " module dependencies"
+      putStrLn $ "Found " ++ modName ++ " module dependencies"
       forM_ modules putStrLn
   else
     -- * Copy the digraph output to a file ('deps.dot' say)