Remove some no-longer-needed #available checks.

Mac/Preferences/Accounts/AccountsNewsBlurWindowController.swift

@@ -128,11 +128,10 @@ class AccountsNewsBlurWindowController: NSWindowController {
 	}
 	
 	// MARK: Autofill
+
 	func enableAutofill() {
-		if #available(macOS 11, *) {
-			usernameTextField.contentType = .username
-			passwordTextField.contentType = .password
-		}
+
+		usernameTextField.contentType = .username
+		passwordTextField.contentType = .password
 	}
-	
 }

Mac/Preferences/Accounts/AccountsReaderAPIWindowController.swift

@@ -196,11 +196,10 @@ class AccountsReaderAPIWindowController: NSWindowController {
 	}
 	
 	// MARK: Autofill
+
 	func enableAutofill() {
-		if #available(macOS 11, *) {
-			usernameTextField.contentType = .username
-			passwordTextField.contentType = .password
-		}
+
+		usernameTextField.contentType = .username
+		passwordTextField.contentType = .password
 	}
-    
 }

Mac/Preferences/Accounts/AddAccountsView.swift

@@ -102,45 +102,24 @@ struct AddAccountsView: View {
 			
 			HStack(spacing: 12) {
 				Spacer()
-				if #available(OSX 11.0, *) {
-					Button(action: {
-						parent?.dismiss(nil)
-					}, label: {
-						Text("Cancel")
-							.frame(width: 76)
-					})
-					.help("Cancel")
-					.keyboardShortcut(.cancelAction)
-					
-				} else {
-					Button(action: {
-						parent?.dismiss(nil)
-					}, label: {
-						Text("Cancel")
-							.frame(width: 76)
-					})
-					.accessibility(label: Text("Add Account"))
-				}
-				if #available(OSX 11.0, *) {
-					Button(action: {
-						addAccountDelegate?.presentSheetForAccount(selectedAccount)
-						parent?.dismiss(nil)
-					}, label: {
-						Text("Continue")
-							.frame(width: 76)
-					})
-					.help("Add Account")
-					.keyboardShortcut(.defaultAction)
-					
-				} else {
-					Button(action: {
-						addAccountDelegate?.presentSheetForAccount(selectedAccount)
-						parent?.dismiss(nil)
-					}, label: {
-						Text("Continue")
-							.frame(width: 76)
-					})
-				}
+				Button(action: {
+					parent?.dismiss(nil)
+				}, label: {
+					Text("Cancel")
+						.frame(width: 76)
+				})
+				.help("Cancel")
+				.keyboardShortcut(.cancelAction)
+
+				Button(action: {
+					addAccountDelegate?.presentSheetForAccount(selectedAccount)
+					parent?.dismiss(nil)
+				}, label: {
+					Text("Continue")
+						.frame(width: 76)
+				})
+				.help("Add Account")
+				.keyboardShortcut(.defaultAction)
 			}
 			.padding(.top, 12)
 			.padding(.bottom, 4)