Removed M.G.C nuspec, we don't use it any longer. Updated the assemblyinfo.

Author: MIchaelMainer

src/Microsoft.Graph.Core/Microsoft.Graph.Core.nuspec

@@ -24,8 +24,8 @@
 //
 // You can specify all the values or you can default the Build and Revision Numbers
 // by using the '*' as shown below:
-[assembly: AssemblyVersion("1.4.0")]
-[assembly: AssemblyFileVersion("1.4.0.0")]
+[assembly: AssemblyVersion("1.5.0")]
+[assembly: AssemblyFileVersion("1.5.0.0")]
 
 #if DEBUG
 [assembly: InternalsVisibleTo("Microsoft.Graph.Core.Test")]

src/Microsoft.Graph.Core/Properties/AssemblyInfo.cs

@@ -24,8 +24,8 @@
 //
 // You can specify all the values or you can default the Build and Revision Numbers
 // by using the '*' as shown below:
-[assembly: AssemblyVersion("1.3.0")]
-[assembly: AssemblyFileVersion("1.3.0.0")]
+[assembly: AssemblyVersion("1.4.0")]
+[assembly: AssemblyFileVersion("1.4.0.0")]
 
 #if DEBUG
 [assembly: InternalsVisibleTo("Microsoft.Graph.Test")]