Temporarily remove incorrect NCL_vector_5.py example

[kafitzgerald]

Removes the (incorrect) NCL_vector_5.py example until we have a working curly vector implementation.

Closes #616
Relates to #314

If we'd rather not remove this for now, we could also look into using quiver from Matplotlib like some of the other vector examples, but I don't think that's a great option for this particular example. The vector field is rather complex and I think it'd be difficult to represent with that plot type. A streamplot is another option, but that's really a different type of visualization.

[kafitzgerald]

This is failing pre-commit because of PyCQA/docformatter#293

[jukent]

I'm in favor of removing it, as you showed here. Or adding some sort of annotation that the example is not displaying scientifically significant vector lengths. I wonder if there are people using this example as a template for other visualization needs (pretty sure they're captured in a different example).

[kafitzgerald]

I'm in favor of removing it, as you showed here. Or adding some sort of annotation that the example is not displaying scientifically significant vector lengths. I wonder if there are people using this example as a template for other visualization needs (pretty sure they're captured in a different example).

Yeah, we have other streamplot examples already so I think the best thing to do here is remove it while we address the issue.