Update gsoc-2025.md

Author: benjagm

programs/mentoring/gsoc/gsoc-2025.md

@@ -27,7 +27,6 @@ The official GSoC 2025 timeline is now live, and our project ideas are on the wa
 Here is the list of our 2025 project ideas:
 - [#874](https://github.com/json-schema-org/community/issues/874): **GSOC 2025 : Build a Java wrapper library for sourcemeta/blaze**
 - [#872](https://github.com/json-schema-org/community/issues/872): **GSOC 2025 : Automated Badge Issuance System For Tour**
-- [#871](https://github.com/json-schema-org/community/issues/871): **GSoC 2025: JSON Schema-based API Mocking Tool**
 - [#870](https://github.com/json-schema-org/community/issues/870): **GSoC 2025: Better JSON Schema Errors**
 - [#868](https://github.com/json-schema-org/community/issues/868): **GSOC 2025 : JSON Schema Visualization Tool - Interactive Graphical Viewer**
 - [#859](https://github.com/json-schema-org/community/issues/859): **GSoC 2025: Adaption of component library in JSON Schema website and completion of test suite development**