fix(#2058): drop false mit license tags from docs + assets derivations

nix/assets.nix

@@ -1,6 +1,5 @@
 {
   stdenv,
-  lib,
   librsvg,
 }:
 
@@ -60,6 +59,5 @@ stdenv.mkDerivation {
   meta = {
     description = "hyperhive static assets (branding + claude prompts)";
     homepage = "https://forge.darkest.space/hyperhive/hyperhive";
-    license = lib.licenses.mit;
   };
 }

nix/reference-docs.nix

@@ -1,6 +1,5 @@
 {
   stdenv,
-  lib,
 }:
 
 # The repo `docs/` markdown tree, shipped as a standalone derivation so
@@ -38,6 +37,5 @@ stdenv.mkDerivation {
   meta = {
     description = "hyperhive reference docs (the repo docs/ tree)";
     homepage = "https://forge.darkest.space/hyperhive/hyperhive";
-    license = lib.licenses.mit;
   };
 }