Misleading answer to structured branching exercise `1_read_code/0_mx.asm`

[KappaPrajd]

This structured branching exercise answer can be misleading. It identifies the structured branching constructs, but it makes a mistake when identifying the else block:

There isn't actually a else block in the program. The code annotated as else block will execute regardless if the given condition is true. I suggest removing this annotation to avoid confusion. I'm happy to provide PR if you agree.