Delete unused methods (open-telemetry#13189)

Author: laurit

testing-common/src/main/java/io/opentelemetry/instrumentation/test/utils/PortUtils.java

@@ -5,10 +5,6 @@
 
 package io.opentelemetry.instrumentation.test.utils;
 
-import java.io.IOException;
-import java.net.Socket;
-import java.util.concurrent.TimeUnit;
-
 public final class PortUtils {
 
   public static final int UNUSABLE_PORT = 61;
@@ -25,59 +21,5 @@ public static int findOpenPort() {
     return portAllocator.getPort();
   }
 
-  @SuppressWarnings("AddressSelection")
-  private static boolean isPortOpen(int port) {
-    try (Socket socket = new Socket((String) null, port)) {
-      return true;
-    } catch (IOException e) {
-      return false;
-    }
-  }
-
-  public static void waitForPortToOpen(int port, long timeout, TimeUnit unit) {
-    long waitUntil = System.currentTimeMillis() + unit.toMillis(timeout);
-
-    while (System.currentTimeMillis() < waitUntil) {
-      if (isPortOpen(port)) {
-        return;
-      }
-
-      try {
-        TimeUnit.MILLISECONDS.sleep(100);
-      } catch (InterruptedException e) {
-        Thread.currentThread().interrupt();
-        throw new IllegalStateException("Interrupted while waiting for " + port + " to be opened");
-      }
-    }
-
-    throw new IllegalStateException("Timed out waiting for port " + port + " to be opened");
-  }
-
-  public static void waitForPortToOpen(int port, long timeout, TimeUnit unit, Process process) {
-    long waitUntil = System.currentTimeMillis() + unit.toMillis(timeout);
-
-    while (System.currentTimeMillis() < waitUntil) {
-      try {
-        Thread.sleep(100);
-      } catch (InterruptedException e) {
-        throw new IllegalStateException("Interrupted while waiting for " + port + " to be opened");
-      }
-
-      // Note: we should have used `process.isAlive()` here but it is java8 only
-      try {
-        process.exitValue();
-        throw new IllegalStateException("Process died before port " + port + " was opened");
-      } catch (IllegalThreadStateException e) {
-        // process is still alive, things are good.
-      }
-
-      if (isPortOpen(port)) {
-        return;
-      }
-    }
-
-    throw new IllegalStateException("Timed out waiting for port " + port + " to be opened");
-  }
-
   private PortUtils() {}
 }