Merged PR 7408008: Revert static route expiry feature support

Need to revert a series of commits:
```
ddb10c4 2022-11-25 | solution refine [jcaiMR]
42af278 2022-11-19 | fix thread exist when key not exists [jcaiMR]
5e80ab5 2022-11-16 | add static route expiry support [jcaiMR]
```
due to below reasons:
1. The commits are not "squash merged", so the prefix "Merged PR XXXX" is missing in commit title.
2. These commits are equal to a combined commit in public repo, which will block public/202012->internal-202012 auto merging
```
fe96679 2022-11-30 | static route expiry feature support (sonic-net#12865) [jcaiMR]
```

So reverting them and wait for auto merging to re-introduce the code to the target branch.