Remove calls to TensorFlow related cellfinder functions

[IgorTatarnikov]

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Description

What is this PR

• [ ] Bug fix
• [ ] Addition of a new feature
• [x] Other

Why is this PR needed? Cellfinder is now using PyTorch so functions related to suppressing TensorFlow error messages no longer exist.

What does this PR do? Removes any comments and function calls relating to suppressing TensorFlow error messages.

References

Waiting on https://github.com/brainglobe/cellfinder/pull/418 to be merged

Is this a breaking change?

No

Does this PR require an update to the documentation?

No

Checklist:

• [x] The code has been tested locally
• [x] The code has been formatted with pre-commit

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 85.64%. Comparing base (3cedfbc) to head (b4b7146).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #112 +/- ## ========================================== - Coverage 85.68% 85.64% -0.04% ========================================== Files 16 16 Lines 838 836 -2 ========================================== - Hits 718 716 -2 Misses 120 120 ```

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