Revert "Allow template sources to use file scheme (#223)" (#240)

This reverts commit 94fd909.

Does not work due to eclipse-archived/codewind#668

Signed-off-by: Tim Etchells <timetchells@ibm.com>

Author: Tim Etchells

dev/src/command/connection/ManageTemplateReposCmd.ts

@@ -236,12 +236,8 @@ function validateRepoInput(input: string): string | undefined {
     catch (err) {
         // not a url
     }
-
-    if (!asUrl) {
-        return "The repository URL must be a valid URL.";
-    }
-    else if (!(asUrl.protocol.startsWith("http") || asUrl.protocol.startsWith("file"))) {
-        return "The repository URL must be a valid http(s) or file URL.";
+    if (!asUrl || !asUrl.host || !asUrl.protocol.startsWith("http")) {
+        return "The repository URL must be a valid http(s) URL.";
     }
     return undefined;
 }