No need to stop pipeline inside signal handler

src/main.rs

@@ -67,11 +67,8 @@ fn main() -> Result<()> {
     });
 
     ctrlc::set_handler({
-        let pipeline_weak = pipeline.downgrade();
         let main_loop = main_loop.clone();
         move || {
-            let pipeline = pipeline_weak.upgrade().unwrap();
-            pipeline.set_state(gst::State::Null).unwrap();
             main_loop.quit();
         }
     })?;