appium-inspector: restrict platforms to linux

electron.meta.platforms evals to different values depending on which
system you eval for. This confuses hydra so we stop doing that since
this package only builds for linux anyways.

pkgs/by-name/ap/appium-inspector/package.nix

@@ -82,6 +82,6 @@ buildNpmPackage {
     license = lib.licenses.asl20;
     mainProgram = "appium-inspector";
     maintainers = with lib.maintainers; [ marie ];
-    inherit (electron.meta) platforms;
+    platforms = lib.platforms.linux;
   };
 }