rm TotallyNotJson

TotallyNotJson.roc now lives on the farm in virtual-dom-wip as Json.roc.
Any reference in stdlib or builtins has been removed, as well as the
last places it was used (in python/ruby-interop examples).

crates/compiler/load_internal/src/module_cache.rs

@@ -91,7 +91,6 @@ impl Default for ModuleCache<'_> {
             DECODE,
             HASH,
             INSPECT,
-            JSON,
         }
 
         Self {