tests: Remove a test that's flaky under textual

Everything this test exercises is also exercised by the
`test_live_tracking_server_exits_properly_on_sigint` test that still
remains in the `TestLiveRemoteSubcommand` class (same test name,
different test class). That test uses `_wait_until_process_blocks` to
ensure that the SIGINT is sent at a known point in the process's
execution, but this one can't. With this test, the SIGINT is sometimes
delivered while the TUI is still starting up, and at that point, the
signal can result in exceptions (teardown of the TUI tries to access
attributes that weren't created because startup was interrupted).

So, remove this test and rely on the remaining one for coverage of how
SIGINT behaves when interrupting our TUI.

Signed-off-by: Matt Wozniski <mwozniski@bloomberg.net>

tests/integration/test_main.py

@@ -1546,44 +1546,6 @@ def test_live_tracking(self, tmp_path):
         # THEN
         assert server.returncode == 0
 
-    def test_live_tracking_server_exits_properly_on_sigint(self, tmp_path):
-        # GIVEN
-        with track_and_wait(tmp_path) as program_file:
-            server = subprocess.Popen(
-                [
-                    sys.executable,
-                    "-m",
-                    "memray",
-                    "run",
-                    "--live",
-                    str(program_file),
-                ],
-                stdin=subprocess.PIPE,
-                stdout=subprocess.PIPE,
-                stderr=subprocess.PIPE,
-                env={"PYTHONUNBUFFERED": "1"},
-                # Explicitly reset the signal handler for SIGINT to work around any signal
-                # masking that might happen on Jenkins.
-                preexec_fn=lambda: signal.signal(
-                    signal.SIGINT, signal.default_int_handler
-                ),
-            )
-
-        # WHEN
-
-        server.send_signal(signal.SIGINT)
-        try:
-            _, stderr = server.communicate(timeout=TIMEOUT)
-        except subprocess.TimeoutExpired:
-            server.kill()
-            raise
-
-        # THEN
-        assert server.returncode == 0
-        assert not stderr
-        assert b"Exception ignored" not in stderr
-        assert b"KeyboardInterrupt" not in stderr
-
 
 class TestTransformSubCommands:
     def test_report_detects_missing_input(self):