make resolc crate publishable (#334)

- Fetching the commit SHA must not panic if not executed in a git
repository.
- Remove the license printer.

---------

Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>

crates/resolc/src/resolc/arguments.rs

@@ -23,10 +23,6 @@ pub struct Arguments {
     #[arg(long = "supported-solc-versions")]
     pub supported_solc_versions: bool,
 
-    /// Print the licence and exit.
-    #[arg(long = "license")]
-    pub license: bool,
-
     /// Specify the input paths and remappings.
     /// If an argument contains a '=', it is considered a remapping.
     /// Multiple Solidity files can be passed in the default Solidity mode.

crates/resolc/src/resolc/main.rs

@@ -51,14 +51,6 @@ fn main_inner() -> anyhow::Result<()> {
         return Ok(());
     }
 
-    if arguments.license {
-        let license_mit = include_str!("../../../../LICENSE-MIT");
-        let license_apache = include_str!("../../../../LICENSE-APACHE");
-
-        writeln!(std::io::stdout(), "{}\n{}\n", license_mit, license_apache)?;
-        return Ok(());
-    }
-
     #[cfg(feature = "parallel")]
     rayon::ThreadPoolBuilder::new()
         .stack_size(RAYON_WORKER_STACK_SIZE)