Remove links to embulk-util-retryhelper-* sub-libraries

Author: dmikurube

docs/embulk-util-retryhelper-jaxrs/index.html

@@ -5,7 +5,7 @@
 ---
 <section id="embulk-util-retryhelper" class="library">
   <h2>embulk-util-retryhelper</h2>
-  <p>Utility library to retry HTTP requests</p>
+  <p>Utility library for retries</p>
 <pre><code>compile "org.embulk:embulk-util-retryhelper:0.9.0"</code></pre>
   <dl>
     <dt>0.9.0</dt>

docs/embulk-util-retryhelper-jetty92/index.html

@@ -44,15 +44,7 @@ <h2>Library References</h2>
     <dt><a href="embulk-util-json/">embulk-util-json</a></dt>
     <dd>Embulk JSON processor for Embulk plugins</dd>
     <dt><a href="embulk-util-retryhelper/">embulk-util-retryhelper</a></dt>
-    <dd>Utility library to retry HTTP requests</dd>
-    <dt><a href="embulk-util-retryhelper-jaxrs/">embulk-util-retryhelper-jaxrs</a></dt>
-    <dd>Utility library to retry HTTP requests through JAX-RS 2.0 Client with Embulk RetryExecutor</dd>
-    <dt><a href="embulk-util-retryhelper-jetty92/">embulk-util-retryhelper-jetty92</a></dt>
-    <dd>Utility library to retry HTTP requests through Jetty 9.2 client with Embulk RetryExecutor</dd>
-    <dt><a href="embulk-util-retryhelper-jetty93/">embulk-util-retryhelper-jetty93</a></dt>
-    <dd>Utility library to retry HTTP requests through Jetty 9.3 client with Embulk RetryExecutor</dd>
-    <dt><a href="embulk-util-retryhelper-jetty94/">embulk-util-retryhelper-jetty94</a></dt>
-    <dd>Utility library to retry HTTP requests through Jetty 9.3 client with Embulk RetryExecutor</dd>
+    <dd>Utility library for retries</dd>
     <dt><a href="embulk-util-rubytime/">embulk-util-rubytime</a></dt>
     <dd>Almost Ruby-compatible date-time processor for Embulk and Embulk plugins</dd>
     <dt><a href="embulk-util-snakeyaml/">embulk-util-snakeyaml</a></dt>