Armor durability never goes down

[sn3akrr]

Issue description

Armor durability won't go down. Damage a player and it stays full always.

• Expected result: What were you expecting to happen?
• Actual result: What actually happened?

Steps to reproduce the issue

1. ...
2. ...

OS and versions

• PocketMine-MP: eeaf75a
• PHP: 7.2.2
• Server OS: Ubuntu
• Game version: PE/Win10 (delete as appropriate)

Plugins

• Test on a clean server without plugins: is the issue reproducible without any plugins loaded?

If the issue is not reproducible without plugins:

• Have you asked for help on our forums before creating an issue?
• Can you provide sample, minimal reproducing code for the issue? If so, paste it in the bottom section
• Paste your list of plugins here (use the 'plugins' command in PocketMine-MP)

Crashdump, backtrace or other files

• Do not paste crashdumps into an issue - please use our Crash Archive at https://crash.pmmp.io for submitting crash reports to not spam the issue tracker. Add links to your reports in the Crash Archive here.
• Please use gist or anything else to add other files and add links here

• ...

[dktapps]

This is not implemented yet.

[sn3akrr]

Oh, I thought it has done that before.

[95CivicSi]

It did until this commit
efca9f0#diff-be0be6071c2c2f0abecaa7dd4e16e2f1

[dktapps]

No, it has never been implemented. @95CivicSi that commit has no bearing on armor whatsoever, unless you used a plugin to make it work. It's still yet to be implemented into the core code, as seen here (look at the documentation) and in subclasses overriding that method.

(P.S. Until recently armor did not even work for anything except PvP. The implementation is incomplete.)