Revert "zink: always init bordercolor value for sampler"
This reverts commit 336dea90.
This change was incorrect for two reasons:
- We already initialize this field on line 334
- Unconditionally setting this to VK_BORDER_COLOR_FLOAT_TRANSPARENT_BLACK breaks rendering with e.g opaque white borders, because we've already matched those to a non-custom enum value first.
Edited by Erik Faye-Lund