Remove unnecessary dependency

Author: chadlwilson

build.gradle

@@ -80,7 +80,6 @@ ext {
 
 dependencies {
   compileOnly project.deps.gocdPluginApi
-  implementation group: 'com.google.code.gson', name: 'gson', version: '2.12.1'
   implementation group: 'cd.go.plugin.base', name: 'gocd-plugin-base', version: '1.0.2'
   implementation group: 'org.apache.directory.api', name: 'api-ldap-client-api', version: '1.0.3'
   constraints {