[CI] Trim redundant nightly test registrations (#34070)

Co-authored-by: Baizhou Zhang <sobereddiezhang@gmail.com>

test/registered/radix_cache/test_cpp_radix_cache.py

@@ -1,41 +0,0 @@
-import unittest
-
-from sglang.srt.environ import envs
-from sglang.srt.utils import kill_process_tree
-from sglang.test.ci.ci_register import register_cuda_ci
-from sglang.test.kits.eval_accuracy_kit import MMLUMixin
-from sglang.test.test_utils import (
-    DEFAULT_MODEL_NAME_FOR_TEST,
-    DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
-    DEFAULT_URL_FOR_TEST,
-    CustomTestCase,
-    popen_launch_server,
-)
-
-# Note: AMD registration removed - test_cpp_radix_cache fails on AMD due to C++ radix tree issues
-register_cuda_ci(est_time=60, suite="nightly-1-gpu", nightly=True)
-
-
-class TestCppRadixCache(CustomTestCase, MMLUMixin):
-    mmlu_score_threshold = 0.65
-    mmlu_num_examples = 64
-    mmlu_num_threads = 32
-
-    @classmethod
-    def setUpClass(cls):
-        envs.SGLANG_EXPERIMENTAL_CPP_RADIX_TREE.set(True)
-        cls.model = DEFAULT_MODEL_NAME_FOR_TEST
-        cls.base_url = DEFAULT_URL_FOR_TEST
-        cls.process = popen_launch_server(
-            cls.model,
-            cls.base_url,
-            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
-        )
-
-    @classmethod
-    def tearDownClass(cls):
-        kill_process_tree(cls.process.pid)
-
-
-if __name__ == "__main__":
-    unittest.main()