Removes old link for Windows support that has been fixed

Author: froque

BUILDING.md

@@ -26,8 +26,6 @@ docker run --rm -v "$PWD":/usr/src/myapp -w /usr/src/myapp -e CC=aarch64-linux-g
 cp libpg_query.so src/main/resources/linux-aarch64/
 ```
 
- - [libpg_query does not support Windows](https://github.com/pganalyze/libpg_query/issues/44)
-
 ### plugin
 
 ```shell