fix: remove unused f32/f64/c32/c64 imports from Orphans.hs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: dmjio

src/ArrayFire/Orphans.hs

@@ -25,7 +25,7 @@ import qualified ArrayFire.Arith     as A
 import qualified ArrayFire.Array     as A
 import qualified ArrayFire.Algorithm as A
 import qualified ArrayFire.Data      as A
-import           ArrayFire.Internal.Defines (f32, f64, c32, c64, s16, s32, s64, u8, u16, u32, u64, b8)
+import           ArrayFire.Internal.Defines (s16, s32, s64, u8, u16, u32, u64, b8)
 import           ArrayFire.Types
 import           ArrayFire.Util
 
@@ -75,7 +75,7 @@ instance (Num a, AFType a) => Num (Array a) where
   abs x
     | dt `elem` [s16, s32, s64] = A.select (A.lt x 0) (0 - x) x
     | dt `elem` [u8, u16, u32, u64, b8] = x
-    | otherwise = A.abs x   -- f32, f64, c32, c64: delegate to AF
+    | otherwise = A.abs x   -- float / complex: delegate to AF
     where dt = afType (Proxy @a)
   signum x    = A.select (A.gt x 0) 1 (A.select (A.lt x 0) (-1) 0)
   negate arr  = A.scalar @a (fromInteger (-1)) `A.mul` arr