I removed abap, flex, pli and rpg dummy implementations since they're
not implemented in the corresponding analyzer and there are no tickets
open to do so.
Inline adoc files when they are included exactly once.
Also fix language tags because this inlining gives us better information
on what language the code is written in.
committed as f6331f7fdca7fe36e52439b927312fd5d5a455c0
The mistake was caused by the uninitialized variable "hasSeeSection" in the
automatic removal script. Fixed here:
f6331f7fdc
