Fix clang 13 compilation problems (#5791)

* Fix clang 13 compilation problems

Re-instated ShowPlayedSequencesDebug logic by introducing no-op lambda
which replaces missing `Draw2dLabel` functionality ( added TODO marker
there )

Signed-off-by: nemerle <96597+nemerle@users.noreply.github.com>

* apply review suggestions

Signed-off-by: nemerle <96597+nemerle@users.noreply.github.com>

* Fix type in assert message

Signed-off-by: nemerle <96597+nemerle@users.noreply.github.com>

Code/Framework/AzQtComponents/AzQtComponents/Components/Widgets/TableView.cpp

@@ -213,12 +213,10 @@ namespace AzQtComponents
         // rectangle drawing.
         if (qTableView || qListView)
         {
-            int hHdr = 0;
             int vHdr = 0;
 
             if (qTableView)
             {
-                hHdr = qTableView->horizontalHeader()->isVisible() ? qTableView->horizontalHeader()->height() : 0;
                 vHdr = qTableView->verticalHeader()->isVisible() ? qTableView->verticalHeader()->width() : 0;
             }
 

Code/Framework/AzToolsFramework/AzToolsFramework/UI/LegacyFramework/MainWindowSavedState.cpp

@@ -23,7 +23,6 @@ namespace AzToolsFramework
         // save 2k at a time :( need a better way to do this.
         AZStd::size_t pos = 0;
         AZStd::size_t remaining = m_windowState.size();
-        AZ::u8* charData = (AZ::u8*)windowState.begin();
 
         while (remaining > 0)
         {
@@ -31,7 +30,6 @@ namespace AzToolsFramework
             m_serializableWindowState.push_back();
             m_serializableWindowState.back().assign((AZ::u8*)windowState.begin() + pos, (AZ::u8*)windowState.begin() + pos + bytes_this_gulp);
             pos += bytes_this_gulp;
-            charData += bytes_this_gulp;
             remaining -= bytes_this_gulp;
         }
     }

Code/Framework/AzToolsFramework/AzToolsFramework/UI/Slice/SlicePushWidget.cpp

@@ -1201,8 +1201,6 @@ namespace AzToolsFramework
                     .arg((item->parent() == nullptr) ? item->m_entity->GetName().c_str() : GetNodeDisplayName(*item->m_node).c_str()));
             }
 
-            SliceTargetTreeItem* parent = nullptr;
-
             AZStd::vector<SliceAssetPtr> validSliceAssets = GetValidTargetAssetsForField(*item);
 
             // For the selected item populate the tree of all valid slice targets.
@@ -1274,7 +1272,6 @@ namespace AzToolsFramework
                     selectButton->setChecked(true);
                 }
 
-                parent = sliceItem;
                 ++level;
             }
         }