Deprecated in v0.2.1 and scheduled for removal in v0.4.0. climatekit
performs no I/O and never writes a cache, so this function has never had
anything to clear. It remains only so that existing scripts keep running.
Value
Invisibly returns FALSE. Prior to v0.2.1 this returned TRUE
when a directory set through options(climatekit.cache_dir = ...)
contained files, which only ever happened if something outside
climatekit had written there.
Details
If you are caching downloaded weather data, clear it with the tools of
whichever data package fetched it (for example readnoaa), not here.
Examples
# \donttest{
# Deprecated: this warns and does nothing.
suppressWarnings(clear_cache())
# }