message: docs: Remove reference to block comments in docs
diff: @@ -33,14 +33,6 @@ Line comments are preceded by a double dash:
  -- this is a comment!
  ```
  -Block comments go between curly-dashes like so:
  -
  -```pikelet
  -{-
  - this is a block comment!
  --}
  -```
  -
  Doc comments are preceded by a triple pipe, and are used to document
  definitions:
  