ffi: Eliminate squeek_button and squeek_row

src/layout.rs

@@ -41,7 +41,7 @@ pub mod c {
     use super::*;
 
     use gtk_sys;
-    use std::os::raw::{ c_char, c_void };
+    use std::os::raw::c_void;
 
     use std::ops::{ Add, Sub };
 
@@ -161,13 +161,6 @@ pub mod c {
 
     // The following defined in Rust. TODO: wrap naked pointers to Rust data inside RefCells to prevent multiple writers
     
-    #[no_mangle]
-    pub extern "C"
-    fn squeek_button_print(button: *const ::layout::Button) {
-        let button = unsafe { &*button };
-        println!("{:?}", button);
-    }
-    
     /// Positions the layout contents within the available space.
     /// The origin of the transformation is the point inside the margins.
     #[no_mangle]