devtools: Handle removeBreakpoint on breakpoint-list actor (#38797)

The breakpoint-list actor did not implement a handler for the
`removeBreakpoint` request, causing the client to receive
`unrecognizedPacketType` error. This patch adds `removeBreakpoint`
handler


Fixes: Part of #36027

Signed-off-by: atbrakhi <atbrakhi@igalia.com>

components/devtools/actors/breakpoint.rs

@@ -42,6 +42,10 @@ impl Actor for BreakpointListActor {
                 let msg = EmptyReplyMsg { from: self.name() };
                 request.reply_final(&msg)?
             },
+            "removeBreakpoint" => {
+                let msg = EmptyReplyMsg { from: self.name() };
+                request.reply_final(&msg)?
+            },
             _ => return Err(ActorError::UnrecognizedPacketType),
         };
         Ok(())