perf(path): simplified code

[hchlq]

Before submitting a pull request, please make sure the following is done...

• [x] Ensure the pull request title and commit message follow the Commit Specific in English.
• [x] Fork the repo and create your branch from master or formily_next.
• [ ] If you've added code that should be tested, add tests!
• [ ] If you've changed APIs, update the documentation.
• [ ] Ensure the test suite passes (npm test).
• [ ] Make sure your code lints (npm run lint) - we've done our best to make sure these rules match our internal linting guidelines.

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What have you changed?

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (3b2c1f9) 99.55% compared to head (c122c3b) 99.55%. Report is 1 commits behind head on formily_next.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## formily_next #3933 +/- ## ============================================= Coverage 99.55% 99.55% ============================================= Files 152 152 Lines 6708 6709 +1 Branches 1877 1876 -1 ============================================= + Hits 6678 6679 +1 Misses 29 29 Partials 1 1 ``` | [Files Changed](https://app.codecov.io/gh/alibaba/formily/pull/3933?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=alibaba) | Coverage Δ | | |---|---|---| | [packages/path/src/index.ts](https://app.codecov.io/gh/alibaba/formily/pull/3933?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=alibaba#diff-cGFja2FnZXMvcGF0aC9zcmMvaW5kZXgudHM=) | `100.00% <100.00%> (ø)` | |

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