chore(cameras): delete unused files

tests/cameras/test_realsense.py

@@ -14,6 +14,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Example of running a specific test:
+# ```bash
+# pytest tests/cameras/test_opencv.py::test_connect
+# ```
+
 import os
 from unittest.mock import patch