by-name.nix: Remove useless `warn` function

Both cppnix and lix now have the `builtins.warn` function.

1 files changed, 3 insertions, 4 deletions

diff --git a/by-name.nix b/by-name.nix
index 2d03e75..1b03712 100644
--- a/by-name.nix
+++ b/by-name.nix
@@ -7,7 +7,6 @@
 #
 # You should have received a copy of the License along with this program.
 # If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
-{warn}:
 # Adapted from this: https://github.com/NixOS/nixpkgs/blob/1814b56453c91192f6d5a6276079948f9fe96c18/pkgs/top-level/by-name-overlay.nix
 # This file should not depend on `pkgs` and thus not use `lib`.
 {
@@ -77,7 +76,7 @@ assert fileRegex == null -> fileName != null; let
     # Type: String -> String -> ListOf Path
     namesForShard = shard: type:
       if type != "directory"
-      then warn "Ignored non-directory, whilst importing by-name directory (${fileDisplay}): '${shard}'" {}
+      then builtins.warn "Ignored non-directory, whilst importing by-name directory (${fileDisplay}): '${shard}'" {}
       else if useShards
       then namesForElementShard shard type
       else namesForElementDirect shard type;
@@ -102,14 +101,14 @@ assert fileRegex == null -> fileName != null; let
           else if relativePaths
           then pathSegment
           else path
-        else warn "'${builtins.toString path}' does not exist. Skipped" null;
+        else builtins.warn "'${builtins.toString path}' does not exist. Skipped" null;
     in
       if toplevelType != "directory"
       then
         # The `namesForShard` function should have already printed a warning.
         [null]
       else if (builtins.attrValues paths) == []
-      then warn "'${fileDisplay}' did not match anything in ${builtins.toString rawPath}. Skipped" [null]
+      then builtins.warn "'${fileDisplay}' did not match anything in ${builtins.toString rawPath}. Skipped" [null]
       else mapAttrsToList checkPath paths;
 
     filterNull = list: builtins.filter (value: value != null) list;