refactor(module:all): remove property for static host className

[trotyl]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[x] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Application (the showcase website) / infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: closes #649

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[coveralls]

Coverage decreased (-0.4%) to 41.351% when pulling 6860f54 on trotyl:static-host-class into 9073bc8 on NG-ZORRO:master.

[trotyl]

Coverage rate decreased due to removal of already covered properties, didn't affect real coverage.

x - 1   x
----- < -
y - 1   y     (x > 1, y > 1)

Ready for review.

[vthinkxie]

seems conflict with #459

[trotyl]

Confirmed, will solve it

[trotyl]

CI failure due to rebased to current master, will rebase again after #679.

[coveralls]

Coverage decreased (-0.4%) to 41.086% when pulling ad900d8 on trotyl:static-host-class into 8ba3ea8 on NG-ZORRO:master.