fix nuget feeds

Author: enricosada

src/fsharp/FSharp.Compiler.Service.ProjectCracker.netcore/NuGet.Config

@@ -1,13 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
-    <!--To inherit the global NuGet package sources remove the <clear/> line below -->
-    <clear />
-    <add key="api.nuget.org" value="https://api.nuget.org/v3/index.json" />
     <add key="fsharp-daily" value="https://www.myget.org/F/fsharp-daily/api/v3/index.json" />
-    <add key="dotnet-buildtools" value="https://dotnet.myget.org/F/dotnet-buildtools/api/v3/index.json" />
-    <add key="dotnet-core" value="https://dotnet.myget.org/F/dotnet-core/api/v3/index.json" />
-    <add key="dotnet-cli" value="https://dotnet.myget.org/F/dotnet-cli/api/v3/index.json" />
-    <add key="cli-deps" value="https://dotnet.myget.org/F/cli-deps/api/v3/index.json" /> 
   </packageSources>
 </configuration>

src/fsharp/FSharp.Compiler.Service.netcore/NuGet.Config

@@ -1,13 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
-    <!--To inherit the global NuGet package sources remove the <clear/> line below -->
-    <clear />
-    <add key="api.nuget.org" value="https://api.nuget.org/v3/index.json" />
     <add key="fsharp-daily" value="https://www.myget.org/F/fsharp-daily/api/v3/index.json" />
-    <add key="dotnet-buildtools" value="https://dotnet.myget.org/F/dotnet-buildtools/api/v3/index.json" />
-    <add key="dotnet-core" value="https://dotnet.myget.org/F/dotnet-core/api/v3/index.json" />
-    <add key="dotnet-cli" value="https://dotnet.myget.org/F/dotnet-cli/api/v3/index.json" />
-    <add key="cli-deps" value="https://dotnet.myget.org/F/cli-deps/api/v3/index.json" /> 
   </packageSources>
 </configuration>