Remove unused org.kohsuke.stapler:stapler-adjunct-zeroclipboard

bom/pom.xml

@@ -359,11 +359,6 @@ THE SOFTWARE.
         <artifactId>stapler-jrebel</artifactId>
         <version>${stapler.version}</version>
       </dependency>
-      <dependency>
-        <groupId>org.kohsuke.stapler</groupId>
-        <artifactId>stapler-adjunct-zeroclipboard</artifactId>
-        <version>1.3.5-1</version>
-      </dependency>
       <dependency>
         <groupId>org.kohsuke.stapler</groupId>
         <artifactId>stapler-adjunct-timeline</artifactId>

core/pom.xml

@@ -153,10 +153,6 @@ THE SOFTWARE.
       <groupId>org.kohsuke</groupId>
       <artifactId>windows-package-checker</artifactId>
     </dependency>
-    <dependency>
-      <groupId>org.kohsuke.stapler</groupId>
-      <artifactId>stapler-adjunct-zeroclipboard</artifactId>
-    </dependency>
     <dependency>
       <groupId>org.kohsuke.stapler</groupId>
       <artifactId>stapler-adjunct-timeline</artifactId>

core/src/main/resources/lib/layout/copyButton.jelly

@@ -39,11 +39,6 @@ THE SOFTWARE.
       This is required as in some browsers, button doesn't properly provide feedback to user actions
       due to the nature of the hack needed to make copy work.
     </st:attribute>
-    <st:attribute name="container">
-      Specify the CSS selector (like ".foo") that points to the ancestor block element that has "positive:relative".
-      According to ZeroClipboard documentation, having such container would improve the accuracy of invisible flash
-      overlay.
-    </st:attribute>
     <st:attribute name="style">
       Additional CSS styles to apply.
     </st:attribute>
@@ -53,8 +48,8 @@ THE SOFTWARE.
   </st:documentation>
 
   <span class="copy-button ${attrs.clazz}" title="${attrs.tooltip}" text="${attrs.text}"
-    message="${attrs.message}" container="${attrs.container}" style="${attrs.style}">
+    message="${attrs.message}" style="${attrs.style}">
     <input type="button"/>
   </span>
   <st:adjunct includes="lib.layout.copyButton.copyButton"/>
-</j:jelly>
\ No newline at end of file
+</j:jelly>