deps: remove version declaration of open-telemetry-bom (#3855)

Author: PhongChuong

pom.xml

@@ -59,15 +59,6 @@
 
   <dependencyManagement>
     <dependencies>
-      <!-- OpenTelemetry -->
-      <dependency>
-        <groupId>io.opentelemetry</groupId>
-        <artifactId>opentelemetry-bom</artifactId>
-        <version>1.51.0</version>
-        <type>pom</type>
-        <scope>import</scope>
-      </dependency>
-
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-shared-dependencies</artifactId>