Remove unnecessary radius calculation in TFCoil class

[chris-ashe]

Description

This is a legacy issue and should be solved by #3748 . There was error checking in the output (should not be there...) that was missed in #3748 and so the $\cos\left(\frac{\pi}{N_{TF}}\right)$ has now been removed

Checklist

I confirm that I have completed the following checks:

• My changes follow the PROCESS style guide
• I have justified any large differences in the regression tests caused by this pull request in the comments.
• I have added new tests where appropriate for the changes I have made.
• If I have had to change any existing unit or integration tests, I have justified this change in the pull request comments.
• If I have made documentation changes, I have checked they render correctly.
• I have added documentation for my change, if appropriate.

[timothy-nunn]

@mkovari you asked on the issue to be listed as a reviewer

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.47%. Comparing base (6ba13ca) to head (08efbb3).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4090   +/-   ##
=======================================
  Coverage   46.47%   46.47%           
=======================================
  Files         123      123           
  Lines       28902    28901    -1     
=======================================
  Hits        13432    13432           
+ Misses      15470    15469    -1     

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[timothy-nunn]

As part of the PR can you also remove the outputting into the OUT.DAT.

If the dimensions are inconsistent, it should be done with logger.error not commenting/outputs to the MFile and OUTFile. No need to do anything if they are consistent.