Remove manual logback appender configuration since Java Agent automatically registers it

Co-authored-by: trask <218610+trask@users.noreply.github.com>

Author: Copilot

reference-application/build.gradle.kts

@@ -22,9 +22,6 @@ dependencies {
     implementation("org.springframework.boot:spring-boot-starter-web")
     implementation("org.springframework.boot:spring-boot-starter-actuator")
 
-    // OpenTelemetry Instrumentation - use logback appender for logs
-    implementation("io.opentelemetry.instrumentation:opentelemetry-logback-appender-1.0")
-    
     // Micrometer for additional metrics
     implementation("io.micrometer:micrometer-registry-prometheus")
 

reference-application/src/main/resources/logback-spring.xml

@@ -9,14 +9,8 @@
         </encoder>
     </appender>
 
-    <!-- OpenTelemetry appender for exporting logs -->
-    <appender name="OpenTelemetry"
-              class="io.opentelemetry.instrumentation.logback.appender.v1_0.OpenTelemetryAppender">
-    </appender>
-
     <root level="INFO">
         <appender-ref ref="STDOUT"/>
-        <appender-ref ref="OpenTelemetry"/>
     </root>
 
     <!-- Reduce OpenTelemetry internal logging -->