Remove Eq Null instance

Author: phadej

CHANGES.md

@@ -1,3 +1,7 @@
+### Version 0.7 (2023-07-31)
+
+  * Remove Eq Null instance. (Future `base` may break it, we remove it profilacticly).
+
 ### Version 0.6.5.1 (2023-07-09)
 
   * Support `aeson-2.2.0.0`

src/Database/PostgreSQL/Simple/Types.hs

@@ -50,10 +50,6 @@ import           Database.PostgreSQL.Simple.Compat (toByteString)
 data Null = Null
           deriving (Read, Show, Typeable)
 
-instance Eq Null where
-    _ == _ = False
-    _ /= _ = False
-
 -- | A placeholder for the PostgreSQL @DEFAULT@ value.
 data Default = Default
            deriving (Read, Show, Typeable)