Remove unused dependency (#14373)

Author: trask

dependencyManagement/build.gradle.kts

@@ -28,7 +28,6 @@ val DEPENDENCY_BOMS = listOf(
   // even if they are only used by test dependencies, so not using junit bom since it is LGPL
 
   "com.fasterxml.jackson:jackson-bom:2.19.2",
-  "com.squareup.okio:okio-bom:3.15.0", // see https://github.com/open-telemetry/opentelemetry-java/issues/5637
   "com.google.guava:guava-bom:33.4.8-jre",
   "org.apache.groovy:groovy-bom:${groovyVersion}",
   "io.opentelemetry:opentelemetry-bom:${otelSdkVersion}",