chore: remove token_factory feature flag

[kerber0x]

Description and Motivation

This PR removes the token_factory feature flag as Migaloo, the only chain using that feature, is migrating to the osmosis token factory definitions.

Related Issues

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Checklist:

• [x] I have read Migaloo's contribution guidelines.
• [x] My pull request has a sound title and description (not something vague like Update index.md)
• [x] All existing and new tests are passing.
• [x] I updated/added relevant documentation.
• [x] The code is formatted properly cargo fmt --all --.
• [x] Clippy doesn't report any issues cargo clippy -- -D warnings.
• [x] I have regenerated the schemas if needed cargo schema.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.46%. Comparing base (78597cf) to head (48ff2d3).

:exclamation: Current head 48ff2d3 differs from pull request most recent head 04a55ef. Consider uploading reports for the commit 04a55ef to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #293 +/- ## ======================================= Coverage 94.46% 94.46% ======================================= Files 219 219 Lines 24860 24860 ======================================= Hits 23483 23483 Misses 1377 1377 ```

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