Delete C++ implementation and dead code

src/compiler.bbb

@@ -18722,6 +18722,8 @@ names: [_][]u8 =
                         ];
                         >args = arguments[..arguments.length - 1];
                         >execution = os_execute(arena, args, envp, zero);
+                        print(executable_path);
+                        print("\n");
 
                         >success = execution.termination_kind == .exit and execution.termination_code == 0;