Remove redundant Rolemaster parser states

TASKS.md

@@ -107,7 +107,7 @@ Affected areas:
 Current validation is split between generic expression parsing and D6 option validation. Rolemaster needs its own validation layer.
 
 Validation rules to add:
-- `RolemasterStandard`
+- standard Rolemaster expressions
   - supports generic `NdS` syntax with any supported side count
   - assumes a dice count of `1` when the count is omitted before `d`
   - integer modifier required