make test agnostic about exact network failure reason.

Co-authored-by: Weihang Lo <[email protected]>

tests/testsuite/bad_config.rs

@@ -2175,27 +2175,15 @@ fn github_pull_request_url() {
         .with_stderr_data(str![[r#"
 [WARNING] dependency (bar) git url https://github.com/foo/bar/pull/123 is not a repository. The path looks like a pull request. Try replacing the dependency with: `git = "https://github.com/foo/bar.git" rev = "refs/pull/123/head"` in the dependency declaration.
 [UPDATING] git repository `https://github.com/foo/bar/pull/123`
-[WARNING] spurious network error (3 tries remaining): unexpected http status code: 404; class=Http (34)
-[WARNING] spurious network error (2 tries remaining): unexpected http status code: 404; class=Http (34)
-[WARNING] spurious network error (1 tries remaining): unexpected http status code: 404; class=Http (34)
+...
 [ERROR] failed to get `bar` as a dependency of package `foo v0.0.0 ([ROOT]/foo)`
 
 Caused by:
   failed to load source for dependency `bar`
 
 Caused by:
   Unable to update https://github.com/foo/bar/pull/123
-
-Caused by:
-  failed to clone into: [ROOT]/home/.cargo/git/db/123-[HASH]
-
-Caused by:
-  network failure seems to have happened
-  if a proxy or similar is necessary `net.git-fetch-with-cli` may help here
-  https://doc.rust-lang.org/cargo/reference/config.html#netgit-fetch-with-cli
-
-Caused by:
-  unexpected http status code: 404; class=Http (34)
+...
 
 "#]])
         .run();