remove unnecessary dependency.

Author: rmehta19

gapic-generator-java/pom.xml

@@ -397,12 +397,10 @@
     <dependency>
       <groupId>com.google.api</groupId>
       <artifactId>gax-grpc</artifactId>
-      <version>2.57.1-SNAPSHOT</version>
     </dependency>
     <dependency>
       <groupId>com.google.api</groupId>
       <artifactId>gax-grpc</artifactId>
-      <version>2.57.1-SNAPSHOT</version>
       <!-- import the test code, https://maven.apache.org/plugins/maven-jar-plugin/examples/create-test-jar.html -->
       <type>test-jar</type>
       <classifier>testlib</classifier>