Library Manager downloads libraries, which are notrequired by the project

Libraries
25

SOULTION FOUND!
The problem was completely elsewhere. I have used a [common] section, as shown in example in this document or this topic:

[common]
;required for all the envs
lib_deps =
  ArduinoJson@6.16.1

So, based on these docs, I have used following:

[common]
lib_deps =
  symlink://D:/Dropbox/Arduino/sketch/libraries/_MiB

And this was not working.
However, if placed in [env] section, everything works fine:

[env]
lib_deps =
  symlink://D:/Dropbox/Arduino/sketch/libraries/_MiB

And thsi works even if all *.h files are placed simply in the root of all my library files D:/Arduino/libraries/_MiB with a very simple library.json:

{
  "name": "MiB",
  "version": "1.0.0"
}