Remove links to external CDNs (#2347)

Author: leotsarev

src/JoinRpg.Portal/Views/Shared/_ValidationScriptsPartial.cshtml

@@ -2,12 +2,7 @@
     <script src="~/lib/jquery-validate/jquery.validate.js"></script>
 </environment>
 <environment exclude="Development">
-    <script src="https://ajax.aspnetcdn.com/ajax/jquery.validate/1.19.0/jquery.validate.min.js"
-            asp-fallback-src="~/lib/jquery-validate/jquery.validate.min.js"
-            asp-fallback-test="window.jQuery && window.jQuery.validator"
-            crossorigin="anonymous"
-            integrity="sha384-jR1IKAba71QSQwPRf3TY+RAEovSBBqf4Hyp7Txom+SfpO0RCZPgXbINV+5ncw+Ph">
-    </script>
+    <script src="~/lib/jquery-validate/jquery.validate.min.js"></script>
 </environment>
 <script src="~/lib/jquery-validation-unobtrusive/jquery.validate.unobtrusive.js"></script>
 <script>

src/JoinRpg.Portal/Views/ShowSchedule/_FullScreenLayout.cshtml

@@ -40,18 +40,8 @@
         <script src="~/js/site.js" asp-append-version="true"></script>
     </environment>
     <environment exclude="Development">
-        <script src="https://ajax.aspnetcdn.com/ajax/jquery/jquery-3.3.1.min.js"
-                asp-fallback-src="~/lib/jquery/jquery.min.js"
-                asp-fallback-test="window.jQuery"
-                crossorigin="anonymous"
-                integrity="sha384-tsQFqpEReu7ZLhBV2VZlAu7zcOV+rXbYlF2cqB8txI/8aZajjp4Bqd+V6D5IgvKT">
-        </script>
-        <script src="https://stackpath.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js"
-                asp-fallback-src="~/lib/twitter-bootstrap/js/bootstrap.min.js"
-                asp-fallback-test="window.jQuery && window.jQuery.fn && window.jQuery.fn.modal"
-                crossorigin="anonymous"
-                integrity="sha384-aJ21OjlMXNL5UyIl/XNwTMqvzeRMZH2w8c5cRVpzpU8Y5bApTppSuUkhZXN0VxHd">
-        </script>
+        <script src="~/lib/jquery/jquery.min.js"></script>
+        <script src="~/lib/twitter-bootstrap/js/bootstrap.min.js"></script>
         <script src="~/js/site.min.js" asp-append-version="true"></script>
     </environment>