chore: remove comments formerly meant for alignment

/**/ is a nice way to align if statements which doesn't work with
nixpkgs-fmt, since it'll reflow the comment to the line preceding the
if. Consequently, we can delete these comments now.

Change-Id: Ifa5327f846a903e07607b21f8eedbc32fc36f758
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8689
Reviewed-by: sterni <sternenseemann@systemli.org>
Autosubmit: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI

nix/sparseTree/default.nix

@@ -45,7 +45,6 @@ let
     let
       withLeading = p: if builtins.substring 0 1 p == "/" then p else "/" + p;
       fullPath =
-        /**/
         if builtins.isPath path then path
         else if builtins.isString path then (root + withLeading path)
         else builtins.throw "Unsupported path type ${builtins.typeOf path}";