Delete unused class (#5729)

javaagent-bootstrap/src/main/java/io/opentelemetry/javaagent/bootstrap/DefineClassContext.java

@@ -1,59 +0,0 @@
-/*
- * Copyright The OpenTelemetry Authors
- * SPDX-License-Identifier: Apache-2.0
- */
-
-package io.opentelemetry.javaagent.bootstrap;
-
-/** Context for tracking whether helper classes were injected during defining class. */
-public final class DefineClassContext {
-  private static final ThreadLocal<DefineClassContext> contextThreadLocal = new ThreadLocal<>();
-
-  private int counter;
-  private boolean helpersInjected;
-
-  private DefineClassContext() {}
-
-  /**
-   * Start defining class. Instrumentation inserts call to this method into ClassLoader.defineClass.
-   */
-  public static void enter() {
-    DefineClassContext context = contextThreadLocal.get();
-    if (context == null) {
-      context = new DefineClassContext();
-      contextThreadLocal.set(context);
-    }
-    context.counter++;
-  }
-
-  /**
-   * Finish defining class. Instrumentation inserts call to this method into
-   * ClassLoader.defineClass.
-   */
-  public static void exit() {
-    exitAndGet();
-  }
-
-  /**
-   * Finish defining class. Instrumentation inserts call to this method into
-   * ClassLoader.defineClass.
-   *
-   * @return true if helper classes were injected
-   */
-  public static boolean exitAndGet() {
-    DefineClassContext context = contextThreadLocal.get();
-    context.counter--;
-    if (context.counter == 0) {
-      contextThreadLocal.remove();
-    }
-    return context.helpersInjected;
-  }
-
-  /** Called when helper classes are injected. */
-  public static void helpersInjected() {
-    DefineClassContext context = contextThreadLocal.get();
-    if (context != null) {
-      context.helpersInjected = true;
-    }
-  }
-}