chore(package/vertico): remove definition override that fixed build

Upstream package definition no correctly includes the various
extensions, so this override is no longer needed.

core/siren-core-package-overrides.el

@@ -18,10 +18,7 @@
                          :files (:defaults "extensions/*.el" "dirvish-pkg.el"))
                 ;; Use fork with for assert -> cl-assert
                 (refine :type git :flavor melpa :host github :repo "Wilfred/refine"
-                        :fork (:host github :repo "jimeh/refine" :branch "use-cl-assert"))
-                ;; Override vertico recipe to fix issues with extensions.
-                (vertico :type git :host github :repo "minad/vertico"
-                         :files (:defaults "extensions/*" (:exclude ".git")))))))
+                        :fork (:host github :repo "jimeh/refine" :branch "use-cl-assert"))))))
 
 (provide 'siren-core-package-overrides)
 ;;; siren-core-packages.el ends here