remove GAS library

loading functions from a single GAS library is super buggy in published
Google Sheets. For now, I'll have to  maintain a copy of all code in the
GAS for each of the five types spreadsheets...

gs/ImportJson.gs

@@ -578,4 +578,4 @@ function convertToBool_(map, key) {
     if (map[key] != null) {
         map[key] = toBool_(map[key]);
     }
-}
+}

gs/type/Interface.gs

@@ -1,55 +0,0 @@
-function EncodeUrlSlug(slug) {
-    return FilterLists.EncodeUrlSlug(slug);
-}
-
-function TrimUrlSlug(slug) {
-    return FilterLists.TrimUrlSlug(slug);
-}
-
-function GenerateHtmlViewLink(url, listName) {
-    return FilterLists.GenerateHtmlViewLink(url, listName);
-}
-
-function GenerateHtmlAddLink(url, listName) {
-    return FilterLists.GenerateHtmlAddLink(url, listName);
-}
-
-function GenerateHtmlHomeLink(url, listName) {
-    return FilterLists.GenerateHtmlHomeLink(url, listName);
-}
-
-function GenerateHtmlGuideLink(url, listName) {
-    return FilterLists.GenerateHtmlGuideLink(url, listName);
-}
-
-function GenerateHtmlForumLink(url, listName) {
-    return FilterLists.GenerateHtmlForumLink(url, listName);
-}
-
-function GenerateHtmlIssuesLink(url, listName) {
-    return FilterLists.GenerateHtmlIssuesLink(url, listName);
-}
-
-function GenerateHtmlEmailLink(url, listName) {
-    return FilterLists.GenerateHtmlEmailLink(url, listName);
-}
-
-function GenerateHtmlForksCombosLink(forkComboListName) {
-    return FilterLists.GenerateHtmlForksCombosLink(forkComboListName);
-}
-
-function GenerateHtmlChangelogLink(url, listName) {
-    return FilterLists.GenerateHtmlChangelogLink(url, listName);
-}
-
-function GenerateHtmlDonateLink(url, listName) {
-    return FilterLists.GenerateHtmlDonateLink(url, listName);
-}
-
-function GetLastUpdated(urlToCheck) {
-    return FilterLists.GetLastUpdated(urlToCheck);
-}
-
-function GenerateHtmlListName(listName) {
-    return FilterLists.GenerateHtmlListName(listName);
-}