vcs: cleanup - remove dead code

The only usage was removed in 7cafb3a2cc907e845718be436345935de7d7e8a6

GitOrigin-RevId: 4e5984315e940aad137a78fbb46f064788f05c12

platform/vcs-impl/src/com/intellij/openapi/vcs/changes/ChangeViewDiffRequestProcessor.java

@@ -95,10 +95,6 @@ public abstract class ChangeViewDiffRequestProcessor extends CacheDiffRequestPro
     return isRequestValid(request) ? request : null;
   }
 
-  protected boolean hasSelection() {
-    return true;
-  }
-
   private static boolean isRequestValid(@Nullable DiffRequest request) {
     if (request instanceof ErrorDiffRequest) return false;
     if (request instanceof ContentDiffRequest) {

platform/vcs-impl/src/com/intellij/openapi/vcs/changes/ChangesViewDiffPreviewProcessor.kt

@@ -28,10 +28,6 @@ private class ChangesViewDiffPreviewProcessor(private val changesView: ChangesLi
 
   override fun getAllChanges(): List<Wrapper> = wrap(changesView.changes, changesView.unversionedFiles)
 
-  override fun hasSelection(): Boolean {
-    return !changesView.isSelectionEmpty
-  }
-
   override fun selectChange(change: Wrapper) {
     changesView.findNodePathInTree(change.userObject)?.let { TreeUtil.selectPath(changesView, it, false) }
   }

platform/vcs-impl/src/com/intellij/openapi/vcs/changes/ui/ChangesViewContentManager.kt

@@ -7,7 +7,10 @@ import com.intellij.openapi.util.Comparing
 import com.intellij.openapi.util.Disposer
 import com.intellij.openapi.util.Key
 import com.intellij.openapi.wm.ToolWindowId
-import com.intellij.ui.content.*
+import com.intellij.ui.content.Content
+import com.intellij.ui.content.ContentManager
+import com.intellij.ui.content.ContentManagerAdapter
+import com.intellij.ui.content.ContentManagerEvent
 import com.intellij.util.ObjectUtils
 import com.intellij.util.containers.ContainerUtil
 import java.util.*
@@ -72,13 +75,6 @@ class ChangesViewContentManager : ChangesViewContentI, Disposable {
     contentManager.setSelectedContent(content, requestFocus)
   }
 
-  fun adviseSelectionChanged(listener: ContentManagerListener) {
-    contentManager?.let {
-      it.addContentManagerListener(listener)
-      Disposer.register(this, Disposable { it.removeContentManagerListener(listener) })
-    }
-  }
-
   override fun <T> getActiveComponent(aClass: Class<T>): T? {
     val selectedContent = contentManager?.selectedContent ?: return null
     return ObjectUtils.tryCast(selectedContent.component, aClass)

platform/vcs-impl/src/com/intellij/openapi/vcs/changes/ui/CommitChangeListDialog.java

@@ -796,12 +796,6 @@ public abstract class CommitChangeListDialog extends DialogWrapper implements Si
       getBrowser().selectEntries(singletonList(change.getUserObject()));
     }
 
-    @Override
-    protected boolean hasSelection() {
-      CommitDialogChangesBrowser browser = getBrowser();
-      return !browser.getSelectedChanges().isEmpty() || !browser.getSelectedUnversionedFiles().isEmpty();
-    }
-
     @NotNull
     private List<Wrapper> wrap(@NotNull Collection<? extends Change> changes, @NotNull Collection<? extends VirtualFile> unversioned) {
       return concat(map(changes, ChangeWrapper::new),

platform/vcs-log/impl/src/com/intellij/vcs/log/history/FileHistoryDiffPreview.kt

@@ -21,10 +21,6 @@ internal class FileHistoryDiffPreview(project: Project, private val changeGetter
     Disposer.register(disposable, this)
   }
 
-  override fun hasSelection(): Boolean {
-    return true
-  }
-
   override fun getSelectedChanges(): List<Wrapper> = allChanges
 
   override fun getAllChanges(): List<Wrapper> {

platform/vcs-log/impl/src/com/intellij/vcs/log/ui/frame/VcsLogChangeProcessor.java

@@ -65,11 +65,6 @@ class VcsLogChangeProcessor extends ChangeViewDiffRequestProcessor {
     }
   }
 
-  @Override
-  protected boolean hasSelection() {
-    return myBrowser.getViewer().getSelectionModel().getSelectionCount() != 0;
-  }
-
   private void updatePreviewLater() {
     ApplicationManager.getApplication().invokeLater(() -> updatePreview(getComponent().isShowing()));
   }