Revert "Added count in project_type"

What does this MR do and why?

Revert "Added count in project_type"

This reverts commit c0e12223.

It was added in !89000 (merged) to support Numbered pagination on the Usage quotas page table https://gitlab.com/gitlab-org/gitlab/-/issues/346364

However

1. There were a few issues raised in the follow up https://gitlab.com/gitlab-org/gitlab/-/issues/364269#note_973091899
2. The feature is technically impossible to implement https://gitlab.com/gitlab-org/gitlab/-/issues/364269#note_974016544
3. We decided to not go through with the feature https://gitlab.com/gitlab-org/gitlab/-/issues/364269#note_1277130251

Some other related issues: https://gitlab.com/gitlab-org/gitlab/-/issues/378369, https://gitlab.com/gitlab-org/gitlab/-/issues/389423

Screenshots or screen recordings

N/A

How to set up and validate locally

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