Unmap a symbol from a namespaceΒΆ

The simplest would be to update the expression that loads everything e.g.:

(ns me.app
  (:require
   [environ.core :refer [env]]  ;; comment this
   ;; [me.env :refer [env]]     ;; uncomment, exit repl and connect again
   ))

But this can also be done without exiting the repl:

(ns-unmap 'me.app 'env)