code refactor to remove Task.Run on CPU bound operation

Author: MaggieKimani1

src/Microsoft.OpenApi.Readers/OpenApiYamlReader.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license.
 
 using System.IO;
@@ -63,7 +63,7 @@ public async Task<ReadFragmentResult<T>> ReadFragmentAsync<T>(TextReader input,
                 return default;
             }
 
-            return await ReadFragmentAsync<T>(jsonNode, version, settings);
+            return ReadFragment<T>(jsonNode, version, settings);
         }
 
         /// <summary>
@@ -86,9 +86,9 @@ public async Task<ReadResult> ReadAsync(JsonNode jsonNode, OpenApiReaderSettings
         }
 
         /// <inheritdoc/>
-        public async Task<ReadFragmentResult<T>> ReadFragmentAsync<T>(JsonNode input, OpenApiSpecVersion version, OpenApiReaderSettings settings = null) where T : IOpenApiElement
+        public ReadFragmentResult<T> ReadFragment<T>(JsonNode input, OpenApiSpecVersion version, OpenApiReaderSettings settings = null) where T : IOpenApiElement
         {
-            return await OpenApiReaderRegistry.DefaultReader.ReadFragmentAsync<T>(input, version, settings);
+            return OpenApiReaderRegistry.DefaultReader.ReadFragment<T>(input, version, settings);
         }
     }
 }

src/Microsoft.OpenApi/Interfaces/IOpenApiReader.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license. 
 
 using System.IO;
@@ -48,6 +48,6 @@ public interface IOpenApiReader
         /// <param name="version">Version of the OpenAPI specification that the fragment conforms to.</param>
         /// <param name="settings">The OpenApiReader settings.</param>
         /// <returns>Instance of newly created IOpenApiElement.</returns>
-        Task<ReadFragmentResult<T>> ReadFragmentAsync<T>(JsonNode input, OpenApiSpecVersion version, OpenApiReaderSettings settings = null) where T: IOpenApiElement;
+        ReadFragmentResult<T> ReadFragment<T>(JsonNode input, OpenApiSpecVersion version, OpenApiReaderSettings settings = null) where T: IOpenApiElement;
     }
 }

src/Microsoft.OpenApi/Reader/OpenApiJsonReader.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license.
 
 using System.IO;
@@ -139,13 +139,13 @@ public async Task<ReadFragmentResult<T>> ReadFragmentAsync<T>(TextReader input,
                 return default;
             }
 
-            return await ReadFragmentAsync<T>(jsonNode, version, settings);
+            return ReadFragment<T>(jsonNode, version, settings);
         }
 
         /// <inheritdoc/>
-        public async Task<ReadFragmentResult<T>> ReadFragmentAsync<T>(JsonNode input,
-                                                                   OpenApiSpecVersion version,
-                                                                   OpenApiReaderSettings settings = null) where T : IOpenApiElement
+        public ReadFragmentResult<T> ReadFragment<T>(JsonNode input,
+                                                     OpenApiSpecVersion version,
+                                                     OpenApiReaderSettings settings = null) where T : IOpenApiElement
         {
             var diagnostic = new OpenApiDiagnostic();
             settings ??= new OpenApiReaderSettings();