CLJS-2668: Unit tests failing as of CLJS-2667

Remove bad precondition

Author: swannodette

src/main/clojure/cljs/analyzer.cljc

@@ -2095,8 +2095,6 @@
 (defn foreign-dep?
   #?(:cljs {:tag boolean})
   [dep]
-  (assert (symbol? dep)
-    (str "cljs.analyzer/foreign-dep? expected symbol got " (pr-str dep)))
   (let [js-index (:js-dependency-index @env/*compiler*)]
     (if-some [[_ {:keys [foreign]}] (find js-index (name dep))]
       foreign