Correctly label non-throwing functions

Remove throws from Element constructor

WebsiteGenerator/Content/Element.swift

@@ -141,7 +141,7 @@ struct Element {
      - Parameter folder: The root folder of the site content.
      - Note: Uses global objects.
      */
-    init?(atRoot folder: URL) throws {
+    init?(atRoot folder: URL) {
         self.inputFolder = folder
         self.path = ""
 
@@ -175,10 +175,10 @@ struct Element {
         }
 
         files.add(page: path, id: id)
-        try self.readElements(in: folder, source: nil)
+        self.readElements(in: folder, source: nil)
     }
 
-    mutating func readElements(in folder: URL, source: String?) throws {
+    mutating func readElements(in folder: URL, source: String?) {
         let subFolders: [URL]
         do {
             subFolders = try FileManager.default
@@ -188,13 +188,13 @@ struct Element {
             log.add(error: "Failed to read subfolders", source: source ?? "root", error: error)
             return
         }
-        self.elements = try subFolders.compactMap { subFolder in
+        self.elements = subFolders.compactMap { subFolder in
             let s = (source.unwrapped { $0 + "/" } ?? "") + subFolder.lastPathComponent
-            return try Element(parent: self, folder: subFolder, path: s)
+            return Element(parent: self, folder: subFolder, path: s)
         }
     }
 
-    init?(parent: Element, folder: URL, path: String) throws {
+    init?(parent: Element, folder: URL, path: String) {
         self.inputFolder = folder
         self.path = path
 
@@ -252,7 +252,7 @@ struct Element {
         // All properties initialized
 
         files.add(page: path, id: id)
-        try self.readElements(in: folder, source: path)
+        self.readElements(in: folder, source: path)
     }
 }