prometheus-simpleclient-java/remove_opentelemetry_tracer.patch

diff --git a/client_java-parent-0.12.0/simpleclient/src/main/java/io/prometheus/client/exemplars/Tracer.java b/client_java-parent-0.12.0/simpleclient/src/main/java/io/prometheus/client/exemplars/Tracer.java
index 97ec4f4..0686268 100644
--- a/client_java-parent-0.12.0/simpleclient/src/main/java/io/prometheus/client/exemplars/Tracer.java
+++ b/client_java-parent-0.12.0/simpleclient/src/main/java/io/prometheus/client/exemplars/Tracer.java
@@ -1,44 +1,14 @@
 package io.prometheus.client.exemplars;
 
-import io.prometheus.client.exemplars.tracer.common.SpanContextSupplier;
-import io.prometheus.client.exemplars.tracer.otel.OpenTelemetrySpanContextSupplier;
-import io.prometheus.client.exemplars.tracer.otel_agent.OpenTelemetryAgentSpanContextSupplier;
-
 class Tracer {
 
   ExemplarSampler initExemplarSampler() {
-    try {
-      Object spanContextSupplier = findSpanContextSupplier();
-      if (spanContextSupplier != null) {
-        return new DefaultExemplarSampler((SpanContextSupplier) spanContextSupplier);
-      }
-    } catch (NoClassDefFoundError ignored) {
-      // simpleclient_tracer_common dependency not found
-    }
     return null;
   }
 
   // Avoid SpanContextSupplier in the method signature so that we can handle the NoClassDefFoundError
   // even if the user excluded simpleclient_tracer_common from the classpath.
   private Object findSpanContextSupplier() {
-    try {
-      if (OpenTelemetrySpanContextSupplier.isAvailable()) {
-        return new OpenTelemetrySpanContextSupplier();
-      }
-    } catch (NoClassDefFoundError ignored) {
-      // tracer_otel dependency not found
-    } catch (UnsupportedClassVersionError ignored) {
-      // OpenTelemetry requires Java 8, but client_java might run on Java 6.
-    }
-    try {
-      if (OpenTelemetryAgentSpanContextSupplier.isAvailable()) {
-        return new OpenTelemetryAgentSpanContextSupplier();
-      }
-    } catch (NoClassDefFoundError ignored) {
-      // tracer_otel_agent dependency not found
-    } catch (UnsupportedClassVersionError ignored) {
-      // OpenTelemetry requires Java 8, but client_java might run on Java 6.
-    }
     return null;
   }
 }