[upstream_utils] Remove ConcurrentQueue (#7183)

It appears to be broken under stress testing (dropped/duplicate values).

This reverts commit 97c6c86f3b (#7066).

upstream_utils/concurrentqueue.py

@@ -1,40 +0,0 @@
-#!/usr/bin/env python3
-
-import os
-import shutil
-
-from upstream_utils import Lib
-
-
-def copy_upstream_src(wpilib_root):
-    wpiutil = os.path.join(wpilib_root, "wpiutil")
-
-    # Copy header into allwpilib
-    dest_filename = os.path.join(
-        wpiutil,
-        f"src/main/native/thirdparty/concurrentqueue/include/wpi/concurrentqueue.h",
-    )
-    shutil.copyfile("concurrentqueue.h", dest_filename)
-    # Rename namespace from moodycamel to wpi
-    with open(dest_filename) as f:
-        content = f.read()
-    content = content.replace("namespace moodycamel", "namespace wpi")
-    content = content.replace("moodycamel::", "wpi::")
-    # The upstream library has macros that would conflict with other thirdparty WPI_ macros
-    content = content.replace("MOODYCAMEL_", "WPI_CQ_")
-    with open(dest_filename, "w") as f:
-        f.write(content)
-
-
-def main():
-    name = "concurrentqueue"
-    url = "https://github.com/cameron314/concurrentqueue"
-    # master on 2024-09-10
-    tag = "6dd38b8a1dbaa7863aa907045f32308a56a6ff5d"
-
-    expected = Lib(name, url, tag, copy_upstream_src)
-    expected.main()
-
-
-if __name__ == "__main__":
-    main()