replaceDependency: fix syntax error

[groxxda]

Motivation for this change

This is parsed as an uri instead of a lambda like it's intended.

Since the error was there from the beginning (given that uri parsing existed one year ago), that code path was almost certainly never used and could as well be removed.

cc @shlevy @oconnorr

Things done

• Tested using sandboxing
  (nix.useSandbox on NixOS,
  or option build-use-sandbox in nix.conf
  on non-NixOS)
• Built on platform(s)
  • NixOS
  • OS X
  • Linux
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Fits CONTRIBUTING.md.

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[mention-bot]

@groxxda, thanks for your PR! By analyzing the history of the files in this pull request, we identified @oconnorr, @shlevy and @roconnor to be potential reviewers.

[shlevy]

@roconnor I think you added the verbosity stuff, OK with just removing the verbose param?