Remove unecessary branching on old nix versions

All these builtins are available since 1.10 or earlier (1.10 being the lib/minver.nix)
2016-06-17 11:06:48 +01:00
parent 9bbac1f4ea
commit bec28d748c
3 changed files with 15 additions and 73 deletions
--- a/lib/strings.nix
+++ b/lib/strings.nix
@@ -16,11 +16,7 @@ rec {
       concatStrings ["foo" "bar"]
       => "foobar"
  */
-  concatStrings =
-    if builtins ? concatStringsSep then
-      builtins.concatStringsSep ""
-    else
-      lib.foldl' (x: y: x + y) "";
+  concatStrings = builtins.concatStringsSep "";

  /* Map a function over a list and concatenate the resulting strings.