Postpone mentions of non-returning functions to EIP-6206

EIPS/eip-3540.md

@@ -141,14 +141,13 @@ types_section := (inputs, outputs, max_stack_height)+
 |-------------------|----------|---------------|--------------------------------------------------------------------------------------------|
 | types_section     | variable | n/a           | stores code section metadata                                                               |
 | inputs            | 1 byte   | 0x00-0x7F     | number of stack elements the code section consumes                                         |
-| outputs           | 1 byte   | 0x00-0x80     | number of stack elements the code section returns or 0x80 for non-returning functions      |
+| outputs           | 1 byte   | 0x00-0x7F     | number of stack elements the code section returns                                          |
 | max_stack_height  | 2 bytes  | 0x0000-0x03FF | maximum number of elements ever placed onto the operand stack by the code section          |
 | code_section      | variable | n/a           | arbitrary bytecode                                                                         |
 | container_section | variable | n/a           | arbitrary EOF-formatted container                                                          |
 | data_section      | variable | n/a           | arbitrary sequence of bytes                                                                |
 
 See [EIP-4750](./eip-4750.md) for more information on the type section content.
-See [EIP-6206](./eip-6206.md) for more information on non-returning functions.
 
 #### EOF version 1 validation rules