cleanup

Author: nkolev92

src/NuGet.Core/NuGet.Packaging/ContentModel/ContentItemCollection.cs

@@ -98,7 +98,7 @@ public void PopulateItemGroups(PatternSet definition, IList<ContentItemGroup> co
                 {
                     foreach (var groupPattern in groupPatterns)
                     {
-                        var item = groupPattern.Match(asset.Path!, definition.PropertyDefinitions);
+                        var item = groupPattern.Match(asset.Path, definition.PropertyDefinitions);
                         if (item != null)
                         {
                             groupAssets ??= GroupAssetsPool.Allocate();
@@ -257,7 +257,7 @@ private List<ContentItem> FindItemsImplementation(PatternSet definition, IEnumer
 
                 foreach (var pathPattern in pathPatterns)
                 {
-                    var contentItem = pathPattern.Match(path!, definition.PropertyDefinitions);
+                    var contentItem = pathPattern.Match(path, definition.PropertyDefinitions);
                     if (contentItem != null)
                     {
                         //If the item is assembly, populate the "related files extensions property".
@@ -341,7 +341,7 @@ static bool ReadOnlyMemoryEquals(ReadOnlyMemory<char> x, ReadOnlyMemory<char> y)
 
             static ReadOnlyMemory<char> GetExtension(Asset asset)
             {
-                int lastIndexOfDot = asset.Path!.LastIndexOf('.');
+                int lastIndexOfDot = asset.Path.LastIndexOf('.');
                 if (lastIndexOfDot != -1)
                 {
                     return asset.Path.AsMemory(lastIndexOfDot);