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### What it does
Checking for imports with single component use path.
### Why is this bad?
Import with single component use path such as `use cratename;`
is not necessary, and thus should be removed.
### Example
```
use regex;
fn main() {
regex::Regex::new(r"^\d{4}-\d{2}-\d{2}$").unwrap();
}
```
Better as
```
fn main() {
regex::Regex::new(r"^\d{4}-\d{2}-\d{2}$").unwrap();
}
```
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