Function remove 

pub fn remove<P, K>(cache: P, key: K) -> Result<()>
where
    P: AsRef<Path>,
    K: AsRef<str>,

Removes an individual index entry synchronously. The associated content will be left in the cache.

Example

use std::io::Read;

fn main() -> cacache_sync::Result<()> {
    let sri = cacache_sync::write("./my-cache", "my-key", b"hello")?;

    cacache_sync::remove("./my-cache", "my-key")?;

    // This fails:
    cacache_sync::read("./my-cache", "my-key")?;

    // But this succeeds:
    cacache_sync::read_hash("./my-cache", &sri)?;

    Ok(())
}