style: remove pointless name-mangled attrs

the fact that removing them didn't break anything shows that they
were completely unneccessary - there is no inheritance tree
using the same names

tests/unit/gui/test_camera_thread.py

@@ -30,7 +30,7 @@ def camera_thread(mock_zmq, qtbot):
 
 def test_init(camera_thread):
     assert camera_thread.running is True
-    assert camera_thread._SampleCameraThread__camera_available is False
+    assert camera_thread._camera_available is False
 
 
 def test_update_daq_status(camera_thread):
@@ -38,15 +38,15 @@ def test_update_daq_status(camera_thread):
     s.geom.beam_location_pxl.x = 100
     s.geom.beam_location_pxl.y = 200
     camera_thread.update_daq_status(s)
-    assert camera_thread._SampleCameraThread__beam_x == 100
-    assert camera_thread._SampleCameraThread__beam_y == 200
+    assert camera_thread._beam_x == 100
+    assert camera_thread._beam_y == 200
 
 
 def test_enable_focus_measurement(camera_thread):
     camera_thread.enable_focus_measurement(True)
-    assert camera_thread._SampleCameraThread__measure_focus is True
+    assert camera_thread._measure_focus is True
     camera_thread.enable_focus_measurement(False)
-    assert camera_thread._SampleCameraThread__measure_focus is False
+    assert camera_thread._measure_focus is False
 
 
 def test_run_success(camera_thread, mock_zmq, qtbot):
@@ -63,7 +63,7 @@ def test_run_success(camera_thread, mock_zmq, qtbot):
     with qtbot.waitSignal(camera_thread.camera_image, timeout=5000):
         camera_thread.run()
 
-    assert camera_thread._SampleCameraThread__camera_available is True
+    assert camera_thread._camera_available is True
 
 
 def test_run_bayer_success(camera_thread, mock_zmq, qtbot):
@@ -80,7 +80,7 @@ def test_run_bayer_success(camera_thread, mock_zmq, qtbot):
     with qtbot.waitSignal(camera_thread.camera_image, timeout=5000):
         camera_thread.run()
 
-    assert camera_thread._SampleCameraThread__camera_available is True
+    assert camera_thread._camera_available is True
 
 
 def test_run_zmq_timeout(camera_thread, mock_zmq, qtbot):
@@ -89,7 +89,7 @@ def test_run_zmq_timeout(camera_thread, mock_zmq, qtbot):
         raise zmq.Again()
 
     mock_zmq.recv_multipart.side_effect = side_effect
-    camera_thread._SampleCameraThread__fps_emit_period_s = 0.0
+    camera_thread._fps_emit_period_s = 0.0
 
     with qtbot.waitSignal(camera_thread.fps_measure, timeout=5000):
         try: