Cleanup: Remove unused asset C functions

This information can be retrieved from `AssetRepresentation` now.
Also remove unnecessarily specific lambda capture. That usually suggests
usage in `std::function` with a more complex lifetime.

source/blender/editors/asset/ED_asset_handle.h

@@ -35,14 +35,8 @@ extern "C" {
 struct AssetHandle;
 
 AssetRepresentationHandle *ED_asset_handle_get_representation(const struct AssetHandle *asset);
-ID_Type ED_asset_handle_get_id_type(const struct AssetHandle *asset);
 int ED_asset_handle_get_preview_icon_id(const struct AssetHandle *asset);
 int ED_asset_handle_get_preview_or_type_icon_id(const struct AssetHandle *asset);
-void ED_asset_handle_get_full_library_path(
-    const struct AssetHandle *asset,
-    /* `1024` for #FILE_MAX,
-     * rely on warnings to let us know if this gets out of sync. */
-    char r_full_lib_path[1024]);
 
 #ifdef __cplusplus
 }

source/blender/editors/asset/intern/asset_handle.cc

@@ -30,11 +30,6 @@ blender::asset_system::AssetRepresentation *ED_asset_handle_get_representation(
   return asset->file_data->asset;
 }
 
-ID_Type ED_asset_handle_get_id_type(const AssetHandle *asset_handle)
-{
-  return asset_handle->file_data->asset->get_id_type();
-}
-
 int ED_asset_handle_get_preview_icon_id(const AssetHandle *asset)
 {
   return asset->file_data->preview_icon_id;
@@ -44,16 +39,3 @@ int ED_asset_handle_get_preview_or_type_icon_id(const AssetHandle *asset)
 {
   return ED_file_icon(asset->file_data);
 }
-
-void ED_asset_handle_get_full_library_path(const AssetHandle *asset_handle,
-                                           char r_full_lib_path[FILE_MAX])
-{
-  *r_full_lib_path = '\0';
-
-  std::string library_path = asset_handle->file_data->asset->get_identifier().full_library_path();
-  if (library_path.empty()) {
-    return;
-  }
-
-  BLI_strncpy(r_full_lib_path, library_path.c_str(), FILE_MAX);
-}

source/blender/editors/asset/intern/asset_shelf_asset_view.cc

@@ -121,7 +121,7 @@ void AssetView::build_items()
     const bool show_names = (shelf_.settings.display_flag & ASSETSHELF_SHOW_NAMES);
 
     const StringRef identifier = asset->get_identifier().library_relative_identifier();
-    const int preview_id = [this, &asset_handle]() -> int {
+    const int preview_id = [&]() -> int {
       if (ED_assetlist_asset_image_is_loading(&library_ref_, &asset_handle)) {
         return ICON_TEMP;
       }