bitbake: tests/fetch: Drop github url from testing

This was introduced as a test for the fix in 6ec70d5d2e330b41b932b0a655b838a5f37df01e
however the way github works has changed in the decade since and this
test is no longer testing what was intended.

The test is failing intermittently on our infrastructure thanks to spam
and IP block throttling restrictions which lead to occasional failures.

At this point it is probably simplest just to drop the url from testing.

(Bitbake rev: 1b619d136c01c97ab1b76a75e8845cddc5e49735)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit b59bdcf8134e6f5935e8f7b0ed8033cbb745e0ff)
Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Paul Barker <paul@pbarker.dev>

bitbake/lib/bb/tests/fetch.py

@@ -1605,8 +1605,6 @@ class FetchCheckStatusTest(FetcherTest):
                       "https://docs.yoctoproject.org",
                       "https://downloads.yoctoproject.org/releases/opkg/opkg-0.1.7.tar.gz",
                       "https://downloads.yoctoproject.org/releases/opkg/opkg-0.3.0.tar.gz",
-                      # GitHub releases are hosted on Amazon S3, which doesn't support HEAD
-                      "https://github.com/kergoth/tslib/releases/download/1.1/tslib-1.1.tar.xz"
                       ]
 
     def _start_checkstatus_server(self):