remove release date text

Author: alpha-beta-soup

src/content/docs/classification/v0-3/structure.mdx

@@ -29,7 +29,3 @@ Each set of attributes applies to one geographical unit and can contain informat
 | **source_data_doi** | (set of) uri | `doi:10.26060/W5B4-WK93` | Optional (i.e. when available) DOI or HTTP URI for source data |
 | **source_date** | string (date range) | `[2011-05-02,2025-01-03)` | Combined date range of spatial features (e.g. image date, ancillary photo date, last edited date) in primary source data, at feature (preferentially) or dataset level, using interval notation for inclusive and exclusive endpoints |
 | **source_scale** | string (integer interval) | `[10,60]` | Combined integer (interval)[https://en.wikipedia.org/wiki/Interval_(mathematics)] indicating the precision of source data, in the CRS units (metres) |
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-*Last updated: October 2025*