Remove specialized task helper

src/Workspaces/Core/Portable/Serialization/SerializableSourceText.cs

@@ -115,30 +115,26 @@ public SourceText GetText(CancellationToken cancellationToken)
         return text;
     }
 
-    public static ValueTask<SerializableSourceText> FromTextDocumentStateAsync(
+    public static async ValueTask<SerializableSourceText> FromTextDocumentStateAsync(
         TextDocumentState state, CancellationToken cancellationToken)
     {
         if (state.TextAndVersionSource.TextLoader is SerializableSourceTextLoader serializableLoader)
         {
             // If we're already pointing at a serializable loader, we can just use that directly.
-            return new(serializableLoader.SerializableSourceText);
+            return serializableLoader.SerializableSourceText;
         }
         else if (state.StorageHandle is TemporaryStorageTextHandle storageHandle)
         {
             // Otherwise, if we're pointing at a memory mapped storage location, we can create the source text that directly wraps that.
-            return new(new SerializableSourceText(storageHandle));
+            return new SerializableSourceText(storageHandle);
         }
         else
         {
             // Otherwise, the state object has reified the text into some other form, and dumped any original
             // information on how it got it.  In that case, we create a new text instance to represent the serializable
             // source text out of.
-
-            return SpecializedTasks.TransformWithoutIntermediateCancellationExceptionAsync(
-                static (state, cancellationToken) => state.GetTextAsync(cancellationToken),
-                static (text, _) => new SerializableSourceText(text, text.GetContentHash()),
-                state,
-                cancellationToken);
+            var text = await state.GetTextAsync(cancellationToken).ConfigureAwait(false);
+            return new SerializableSourceText(text, text.GetContentHash());
         }
     }
 

src/Workspaces/Core/Portable/Workspace/Solution/ProjectState_Checksum.cs

@@ -21,13 +21,10 @@ public bool TryGetStateChecksums([NotNullWhen(true)] out ProjectStateChecksums?
     public Task<ProjectStateChecksums> GetStateChecksumsAsync(CancellationToken cancellationToken)
         => LazyChecksums.GetValueAsync(cancellationToken);
 
-    public Task<Checksum> GetChecksumAsync(CancellationToken cancellationToken)
+    public async ValueTask<Checksum> GetChecksumAsync(CancellationToken cancellationToken)
     {
-        return SpecializedTasks.TransformWithoutIntermediateCancellationExceptionAsync(
-            static (lazyChecksums, cancellationToken) => new ValueTask<ProjectStateChecksums>(lazyChecksums.GetValueAsync(cancellationToken)),
-            static (projectStateChecksums, _) => projectStateChecksums.Checksum,
-            LazyChecksums,
-            cancellationToken).AsTask();
+        var projectStateChecksums = await this.LazyChecksums.GetValueAsync(cancellationToken).ConfigureAwait(false);
+        return projectStateChecksums.Checksum;
     }
 
     public Checksum GetParseOptionsChecksum()

src/Workspaces/Core/Portable/Workspace/Solution/TextDocumentState.cs

@@ -97,18 +97,13 @@ public bool TryGetTextVersion(out VersionStamp version)
     public bool TryGetTextAndVersion([NotNullWhen(true)] out TextAndVersion? textAndVersion)
         => TextAndVersionSource.TryGetValue(LoadTextOptions, out textAndVersion);
 
-    public ValueTask<SourceText> GetTextAsync(CancellationToken cancellationToken)
+    public async ValueTask<SourceText> GetTextAsync(CancellationToken cancellationToken)
     {
         if (TryGetText(out var text))
-        {
-            return new ValueTask<SourceText>(text);
-        }
+            return text;
 
-        return SpecializedTasks.TransformWithoutIntermediateCancellationExceptionAsync(
-            static (self, cancellationToken) => self.GetTextAndVersionAsync(cancellationToken),
-            static (textAndVersion, _) => textAndVersion.Text,
-            this,
-            cancellationToken);
+        var textAndVersion = await GetTextAndVersionAsync(cancellationToken).ConfigureAwait(false);
+        return textAndVersion.Text;
     }
 
     public SourceText GetTextSynchronously(CancellationToken cancellationToken)

src/Workspaces/Core/Portable/Workspace/Solution/TextDocumentState_Checksum.cs

@@ -21,13 +21,10 @@ public bool TryGetStateChecksums([NotNullWhen(returnValue: true)] out DocumentSt
     public Task<DocumentStateChecksums> GetStateChecksumsAsync(CancellationToken cancellationToken)
         => _lazyChecksums.GetValueAsync(cancellationToken);
 
-    public Task<Checksum> GetChecksumAsync(CancellationToken cancellationToken)
+    public async ValueTask<Checksum> GetChecksumAsync(CancellationToken cancellationToken)
     {
-        return SpecializedTasks.TransformWithoutIntermediateCancellationExceptionAsync(
-            static (lazyChecksums, cancellationToken) => new ValueTask<DocumentStateChecksums>(lazyChecksums.GetValueAsync(cancellationToken)),
-            static (documentStateChecksums, _) => documentStateChecksums.Checksum,
-            _lazyChecksums,
-            cancellationToken).AsTask();
+        var documentStateChecksums = await _lazyChecksums.GetValueAsync(cancellationToken).ConfigureAwait(false);
+        return documentStateChecksums.Checksum;
     }
 
     private async Task<DocumentStateChecksums> ComputeChecksumsAsync(CancellationToken cancellationToken)