more doc fixes

docs/reference/js/comment.md

@@ -38,16 +38,10 @@ This function has comments that describe the purpose of the function:
  * @param x TODO
  */
 export function square(x: number) : number {
-    let result: number
     return x * x
-    return result
 }
 ```
 
-### Formatting
-
-Use [markdown syntax](/js/markdown) to format your comments (for example, **bold** and *italic* formatting).
-
 ### Commenting out code
 
 During the debugging process, you may want to comment out a section of your code so that it doesn't run.