fix: init cache when parent dir does not exist

Author: sebffischer

NEWS.md

@@ -3,6 +3,8 @@
 ## Bug Fixes
 
 * `t_opt("adamw")` now actually uses AdamW and not Adam.
+* Caching: Cache directory is now created, even if its parent
+  directory does not exist.
 
 # mlr3torch 0.3.1
 

R/cache.R

@@ -25,8 +25,6 @@ get_cache_dir = function(cache = NULL) {
     cache = R_user_dir("mlr3torch", "cache")
   }
 
-  assert(check_directory_exists(cache), check_path_for_output(cache),
-    .var.name = "cache is a valid path")
   normalizePath(cache, mustWork = FALSE)
 }