SWRDataLabLight: Double label

[awesomephant]

[awesomephant]

• actual duplicate label point in the underlying data versatiles, see: https://tiles.versatiles.org/#map=18.32/48.570306/8.809835
• all we can do here is hide it
• reported upstream: Duplicate label point near 48.570306 / 8.809835 versatiles-org/shortbread-tilemaker#22