Remove Gitea compatibility check from GitHub URL parser

The isGiteaCompatibleServer() fallback method and its invocation have been removed to simplify the authentication detection logic.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: vinokurig

wsmaster/che-core-api-factory-github-common/src/main/java/org/eclipse/che/api/factory/server/github/AbstractGithubURLParser.java

@@ -149,39 +149,16 @@ private boolean isApiRequestRelevant(String repositoryUrl) {
         return e.getMessage().contains("Requires authentication")
             || // for older GitHub Enterprise versions
             e.getMessage().contains("Must authenticate to access this API.");
-      } catch (ScmItemNotFoundException e) {
-        // GitHub API v3 (/api/v3/user) returned 404 — this server does not expose the GitHub
-        // v3 API path. Fall back to checking the Gitea-compatible API (/api/v1/user): if that
-        // endpoint returns 401 the server is a GitHub-compatible instance (e.g. Gitea).
-        return isGiteaCompatibleServer(serverUrl);
-      } catch (ScmBadRequestException | IllegalArgumentException | ScmCommunicationException e) {
+      } catch (ScmItemNotFoundException
+          | ScmBadRequestException
+          | IllegalArgumentException
+          | ScmCommunicationException e) {
         return false;
       }
     }
     return false;
   }
 
-  /**
-   * Returns {@code true} when the server at {@code serverUrl} exposes a Gitea-style GitHub
-   * compatible API ({@code /api/v1/user}) and requires authentication (HTTP 401).
-   */
-  private boolean isGiteaCompatibleServer(String serverUrl) {
-    try {
-      HttpRequest request =
-          HttpRequest.newBuilder()
-              .uri(URI.create(serverUrl + "/api/v1/user"))
-              .timeout(Duration.ofSeconds(10))
-              .GET()
-              .build();
-      HttpResponse<Void> response =
-          HttpClient.newHttpClient().send(request, HttpResponse.BodyHandlers.discarding());
-      return response.statusCode() == 401;
-    } catch (Exception e) {
-      LOG.debug("Failed to reach Gitea API at {}: {}", serverUrl, e.getMessage());
-      return false;
-    }
-  }
-
   private Optional<String> getServerUrl(String repositoryUrl) {
     // If the given repository url is an SSH url, generate the base url from the pattern:
     // https://<hostname extracted from the SSH url>.