Reverted solution update (#22706)

Author: vidai-msft

src/KeyVault/KeyVault.sln

@@ -24,8 +24,6 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "KeyVault.Sdk", "KeyVault.Sd
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Az.KeyVault", "KeyVault.Autorest\Az.KeyVault.csproj", "{0062B427-4E86-43EF-8D7F-2E211D3C1BE7}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Network.Management.Sdk", "..\Network\Network.Management.Sdk\Network.Management.Sdk.csproj", "{46D2C182-FE70-46DD-85AD-C356275BBBFE}"
-EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU