diff --git a/gax/src/main/java/com/google/api/gax/nativeimage/substitutions/ApiClientVersionSubstitutions.java b/gax/src/main/java/com/google/api/gax/nativeimage/substitutions/ApiClientVersionSubstitutions.java
deleted file mode 100644
index c054bf03d..000000000
--- a/gax/src/main/java/com/google/api/gax/nativeimage/substitutions/ApiClientVersionSubstitutions.java
+++ /dev/null
@@ -1,78 +0,0 @@
-/*
- * Copyright 2022 Google LLC
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google LLC nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-package com.google.api.gax.nativeimage.substitutions;
-
-import com.oracle.svm.core.annotate.Alias;
-import com.oracle.svm.core.annotate.Substitute;
-import com.oracle.svm.core.annotate.TargetClass;
-import java.util.function.BooleanSupplier;
-
-/** Substitution for setting Java version correctly in the Google Java Http Client. */
-@TargetClass(
-    className =
-        "com.google.api.client.googleapis.services.AbstractGoogleClientRequest$ApiClientVersion",
-    onlyWith = ApiClientVersionSubstitutions.OnlyIfInClassPath.class)
-final class ApiClientVersionSubstitutions {
-
-  @Alias private String versionString;
-
-  @Substitute
-  public String toString() {
-    String[] tokens = versionString.split(" ");
-
-    if (tokens.length > 0 && tokens[0].startsWith("gl-java")) {
-      tokens[0] += "-graalvm";
-      return String.join(" ", tokens);
-    } else {
-      return versionString;
-    }
-  }
-
-  private ApiClientVersionSubstitutions() {}
-
-  static class OnlyIfInClassPath implements BooleanSupplier {
-
-    @Override
-    public boolean getAsBoolean() {
-      try {
-        // Note: Set initialize = false to avoid initializing the class when looking it up.
-        Class.forName(
-            "com.google.api.client.googleapis.services."
-                + "AbstractGoogleClientRequest$ApiClientVersion",
-            false,
-            Thread.currentThread().getContextClassLoader());
-        return true;
-      } catch (ClassNotFoundException e) {
-        return false;
-      }
-    }
-  }
-}