fix (test): remove test and coverage for BaseCollector.background_report

As the BaseCollector.background_report runs in a thread on top of a `while True` loop, it's test is impossible to capture the output.

Signed-off-by: Paulo Vital <[email protected]>

Author: pvital

src/instana/collector/base.py

@@ -131,7 +131,7 @@ def background_report(self) -> None:
 
         @return: None
         """
-        while True:
+        while True:  # pragma: no cover
             if self.thread_shutdown.is_set():
                 logger.debug(
                     "Thread shutdown signal is active: Shutting down reporting thread"

tests/collector/test_base_collector.py

@@ -146,11 +146,6 @@ def test_shutdown(
         assert "Collector.shutdown: Reporting final data." in caplog.messages
         assert not self.collector.started
 
-    def test_background_report(self) -> None:
-        assert self.collector.background_report()
-        self.collector.thread_shutdown.set()
-        assert not self.collector.background_report()
-
     def test_should_send_snapshot_data(self, caplog: LogCaptureFixture) -> None:
         caplog.set_level(logging.DEBUG, logger="instana")
         self.collector.should_send_snapshot_data()