Do not load user repos with timer

* load user repositories on Repositories view render (in case admin
  token exists) instead of with interval timer
* remove unused keys from re-frame default-db

src/cljs/commiteth/db.cljs

@@ -8,6 +8,4 @@
    :open-bounties []
    :owner-bounties   {}
    :top-hunters []
-   :activity-feed []
+   :activity-feed []})
-   :gh-token nil
-   :gh-admin-token nil})

src/cljs/commiteth/handlers.cljs

@@ -96,8 +96,7 @@
    (let [ls-data (update-local-storage-tokens store login token admin-token)]
      (println "update-tokens, ls-data:" ls-data)
      {:db         (merge db ls-data)
-      :store      ls-data
+      :store      ls-data})))
-      :dispatch [:load-user-repos]})))
 
 ;; copied from plumbing.core to avoid cljsbuild warnings
 (defn dissoc-in

src/cljs/commiteth/repos.cljs

@@ -92,4 +92,6 @@
           [:i.warning.icon]
           "To set bounties for your repositories or for organizations' repositories where you have access, you need to grant Commit ETH the required permissions"]
          [:a.ui.button.small {:href js/authorizeUrlAdmin} "Enable"]]
-        [repos-page-token-ok]))))
+        (do
+          (rf/dispatch [:load-user-repos])
+          [repos-page-token-ok])))))