chore: fix lint warnings

src/programs/echo_sender.ts

@@ -35,7 +35,9 @@ export class SingleEcho extends EchoSender {
     this.signalStop();
   }
 
-  protected _stop() {}
+  protected _stop() {
+    // Nothing to do
+  }
 
   static getProgramInfo(viewgraph: ViewGraph, srcId: DeviceId): ProgramInfo {
     const programInfo = new ProgramInfo(this.PROGRAM_NAME);

src/programs/index.ts

@@ -30,14 +30,13 @@ export interface Program {
 }
 
 /**
- * This interface matches a class having a constructor with the given signature
+ * This type matches a class having a constructor with the given signature
  */
-interface ProgramConstructor {
-  /**
-   * Creates a Program from the given inputs
-   */
-  new (viewgraph: ViewGraph, srcId: DeviceId, inputs: string[]): Program;
-}
+type ProgramConstructor = new (
+  viewgraph: ViewGraph,
+  srcId: DeviceId,
+  inputs: string[],
+) => Program;
 
 // List of all programs.
 // Each one has to:

src/types/devices/host.ts

@@ -4,9 +4,6 @@ import PcImage from "../../assets/pc.svg";
 import { Position } from "../common";
 import { IpAddress } from "../../packets/ip";
 import { DeviceInfo, RightBar } from "../../graphics/right_bar";
-import { ProgramInfo } from "../../graphics/renderables/device_info";
-import { sendPacket } from "../packet";
-import { Ticker } from "pixi.js";
 import { DeviceId } from "../graphs/datagraph";
 import { Layer } from "./layer";
 import { isHost } from "../graphs/datagraph";
@@ -18,8 +15,6 @@ import {
   RunningProgram,
 } from "../../programs";
 
-const ECHO_SERVER_NAME = "Echo server";
-
 export class Host extends Device {
   private runningPrograms = new Map<Pid, Program>();
   private lastProgramId = 0;

src/types/packet.ts

@@ -10,15 +10,9 @@ import { circleGraphicsContext, Colors, ZIndexLevels } from "../utils";
 import { RightBar, StyledInfo } from "../graphics/right_bar";
 import { Position } from "./common";
 import { ViewGraph } from "./graphs/viewgraph";
-import {
-  EmptyPayload,
-  ICMP_PROTOCOL_NUMBER,
-  IpAddress,
-  IPv4Packet,
-} from "../packets/ip";
+import { EmptyPayload, IpAddress, IPv4Packet } from "../packets/ip";
 import { EchoRequest, EchoReply } from "../packets/icmp";
 import { DeviceId, isRouter } from "./graphs/datagraph";
-import { EthernetFrame } from "../packets/ethernet";
 
 const contextPerPacketType: Record<string, GraphicsContext> = {
   IP: circleGraphicsContext(Colors.Green, 0, 0, 5),