Migrate images for new widgets

application/src/main/data/images/names.json

@@ -76,6 +76,7 @@
   "digital_gauges.simple_gauge_justgage.png" : "Simple gauge - image",
   "digital_gauges.simple_neon_gauge_justgage.png" : "Simple neon gauge - image",
   "digital_gauges.vertical_bar_justgage.png" : "Vertical bar - image",
+  "doughnut.png" : "Doughnut - image",
   "edge_widgets.edges_overview.png" : "Edge Quick Overview - image",
   "edge_widgets.png" : "Edge widgets - image",
   "entity_admin_widgets.asset_admin_table.png" : "Asset admin table - image",
@@ -129,6 +130,7 @@
   "horizontal_co2_card_with_background.png" : "Horizontal CO2 card with background - image",
   "horizontal_cylinder_tank.png" : "Horizontal cylinder tank - image",
   "horizontal_dish_ends_tank.png" : "Horizontal dish ends tank - image",
+  "horizontal_doughnut.png" : "Horizontal doughnut - image",
   "horizontal_ellipse_tank.png" : "Horizontal ellipse tank - image",
   "horizontal_flooding_level_card.png" : "Horizontal flooding level card - image",
   "horizontal_flooding_level_card_with_background#background_image.png" : "Horizontal flooding level card with background - background image",

application/src/main/java/org/thingsboard/server/service/install/update/SystemImagesMigrator.java

@@ -19,14 +19,12 @@ import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.node.ArrayNode;
 import com.fasterxml.jackson.databind.node.ObjectNode;
-import com.google.common.hash.Hashing;
 import lombok.SneakyThrows;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.StringUtils;
 import org.thingsboard.common.util.JacksonUtil;
 import org.thingsboard.server.common.data.util.MediaTypeUtils;
 
-import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;