fix: removed erroneous import that it's not used

Signed-off-by: Andre Dietisheim <[email protected]>

Author: adietish

src/main/kotlin/com/redhat/devtools/intellij/kubernetes/tree/ResourceTreeToolWindowFactory.kt

@@ -24,7 +24,6 @@ import com.intellij.ui.tree.AsyncTreeModel
 import com.intellij.ui.tree.StructureTreeModel
 import com.intellij.ui.treeStructure.Tree
 import com.intellij.util.concurrency.Invoker
-import com.redhat.devtools.intellij.common.compat.PopupHandlerAdapter
 import com.redhat.devtools.intellij.common.utils.IDEAContentFactory
 import com.redhat.devtools.intellij.kubernetes.actions.getElement
 import com.redhat.devtools.intellij.kubernetes.editor.ResourceEditorFactory