Remove emtpy string floating in space on L_TDK_SLF12575

[evanshultz]

When opening this footprint you will see it way off to the right side:

That's because there was an empty string of text way off to the right. This deletes it. Since this is quick and easy hopefully it can be squeezed in before closing this repo.

---

:warning: Deprecation warning

On Oct 1, 2020 this repository, including issues and pull requests, will be archived and transferred to gitlab.com. In order for your pull requests and issues to be imported into GitLab you must set your email address on GitHub to public and use the same address for your GitLab account. Or login to GitLab at least once using the GitHub icon. Otherwise the importer can't correlate the account information and the issues/comments on GitLab will be owned by kicad-bot (importer documentation).

---

All contributions to the kicad library must follow the KiCad library convention

Thanks for creating a pull request to contribute to the KiCad libraries! To speed up integration of your PR, please check the following items:

• [ ] Provide a URL to a datasheet for the footprint(s) you are contributing
• [ ] An example screenshot image is very helpful
• [ ] If there are matching symbol or 3D model pull requests, provide link(s) as appropriate
• [ ] Check the output of the Travis automated check scripts - fix any errors as required
• [ ] Give a reason behind any intentional library convention rule violation.

---

Be patient, we maintainers are volunteers with limited time and need to check your contribution against the datasheet. You can speed up the process by providing all the necessary information (see above). And you can speed up the process even more by providing a dimensioned drawing of your contribution. A tutorial on how to do that is found here: https://forum.kicad.info/t/how-to-check-footprint-correctness/9279 (This is optional!)

[myfreescalewebpage]

@evanshultz no comment, merging