build.gradle in embulk-input-jira-0.2.7 vs build.gradle in embulk-input-jira-0.2.8

@@ -7,26 +7,22 @@
 }
 import com.github.jrubygradle.JRubyExec
 repositories {
     mavenCentral()
     jcenter()
-    maven {
-        url "https://dl.bintray.com/embulk-base-restclient/maven"
-    }
 }
 configurations {
     provided
 }
 
-version = "0.2.7"
+version = "0.2.8"
 
 sourceCompatibility = 1.8
 targetCompatibility = 1.8
 
 dependencies {
     compile  "org.embulk:embulk-core:0.9.11"
     provided "org.embulk:embulk-core:0.9.11"
-    compile  "org.embulk.base.restclient:embulk-util-retryhelper-jetty92:0.6.0"
     compile group: 'org.apache.httpcomponents', name: 'httpclient', version: '4.5.6'
     compile group: 'org.glassfish.jersey.core', name: 'jersey-client', version: '2.27'
     compile group: 'com.google.code.gson', name: 'gson', version: '2.8.5'
     testCompile "junit:junit:4.+"
     testCompile "org.mockito:mockito-core:2.+"