don't use syn

Author: pvdrz

bindgen-cli/options.rs

@@ -574,9 +574,6 @@ where
                 .value_name("override")
                 .multiple_occurrences(true)
                 .number_of_values(1),
-            Arg::new("unsafe-blocks")
-                .long("unsafe-blocks")
-                .help("Wrap all the bodies of generated `unsafe` functions in `unsafe` blocks."),
             Arg::new("V")
                 .long("version")
                 .help("Prints the version, and exits"),
@@ -1109,9 +1106,5 @@ where
         }
     }
 
-    if matches.is_present("unsafe-blocks") {
-        builder = builder.unsafe_blocks(true);
-    }
-
     Ok((builder, output, verbose))
 }