Remove Router.js package

Router.js version 2 only provides esm and cjs versions, so it cannot be
loaded natively by the DNN JS library framework

Author: bdukes

package.json

@@ -66,7 +66,6 @@
     "quill": "1.3.7",
     "respond.js": "1.4.2",
     "responsive-tabs": "1.6.3",
-    "routerjs": "2.1.0",
     "select2": "4.0.10",
     "spectrum-colorpicker": "1.8.0",
     "swiper": "4.5.0",

routerjs/CHANGES.htm

@@ -4861,11 +4861,6 @@ root-check@^1.0.0:
     downgrade-root "^1.0.0"
     sudo-block "^1.1.0"
 
-routerjs@2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/routerjs/-/routerjs-2.1.0.tgz#468cc0be8f5c207f389970519170473a379f8dc5"
-  integrity sha512-RUbVdtR1drp/sz63ufs05FsQTOl+yCWerANDbIP7WM0Q5e2QCZ+cELKvmhlMqgPlsF2sSJopKNpYxAHz4seYng==
-
 run-async@^2.0.0, run-async@^2.2.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/run-async/-/run-async-2.3.0.tgz#0371ab4ae0bdd720d4166d7dfda64ff7a445a6c0"