Rust: Remove unnecessary no_mangle statements to silence warnings

src/drawing.rs

@@ -24,7 +24,6 @@ mod c {
     #[derive(Clone, Copy)]
     pub struct EekRenderer(*const c_void);
 
-    #[no_mangle]
     extern "C" {
         // Button and View inside CButtonPlace are safe to pass to C
         // as long as they don't outlive the call

src/imservice.rs

@@ -32,9 +32,9 @@ pub mod c {
     #[repr(transparent)]
     pub struct InputMethod(*const c_void);
 
-    #[no_mangle]
     extern "C" {
         fn imservice_destroy_im(im: *mut c::InputMethod);
+
         #[allow(improper_ctypes)] // IMService will never be dereferenced in C
         pub fn imservice_connect_listeners(im: *mut InputMethod, imservice: *const IMService);
         pub fn eek_input_method_commit_string(im: *mut InputMethod, text: *const c_char);

src/layout.rs

@@ -52,7 +52,6 @@ pub mod c {
     #[derive(Copy, Clone)]
     pub struct EekGtkKeyboard(pub *const gtk_sys::GtkWidget);
 
-    #[no_mangle]
     extern "C" {
         #[allow(improper_ctypes)]
         pub fn eek_gtk_keyboard_emit_feedback(

src/locale.rs

@@ -24,7 +24,6 @@ mod c {
     #[repr(C)]
     pub struct GnomeXkbInfo(*const c_void);
 
-    #[no_mangle]
     extern "C" {
         // from libc
         pub fn strcoll(cs: *const c_char, ct: *const c_char) -> c_int;

src/manager.rs

@@ -9,7 +9,6 @@ pub mod c {
     #[derive(Clone, Copy)]
     pub struct Manager(*const c_void);
     
-    #[no_mangle]
     extern "C" {
         pub fn eekboard_context_service_set_overlay(
             manager: Manager,

src/popover.rs

@@ -29,7 +29,6 @@ use ::logging::Warn;
 mod c {
     use std::os::raw::c_char;
 
-    #[no_mangle]
     extern "C" {
         pub fn popover_open_settings_panel(panel: *const c_char);
     }

src/ui_manager.rs

@@ -19,7 +19,6 @@ pub mod c {
     #[repr(transparent)]
     pub struct UIManager(*const c_void);
 
-    #[no_mangle]
     extern "C" {
         pub fn server_context_service_update_visible(imservice: *const UIManager, active: u32);
         pub fn server_context_service_release_visibility(imservice: *const UIManager);

src/vkeyboard.rs

@@ -37,7 +37,6 @@ pub mod c {
         }
     }
 
-    #[no_mangle]
     extern "C" {
         // From libc, to let KeyMap get deallocated.
         fn close(fd: u32);