Remove xml declaration from Tools.csproj (#6729)
Remove xml declaration from Tools.csproj (#6729)

Mirror of action from ongoing PR https://github.com/dotnet/arcade/pull/7693
AndyGerlicher/msbuild,rainersigwald/msbuild,sean-gilliam/msbuild,AndyGerlicher/msbuild,sean-gilliam/msbuild,sean-gilliam/msbuild,rainersigwald/msbuild,AndyGerlicher/msbuild,rainersigwald/msbuild,rainersigwald/msbuild,AndyGerlicher/msbuild,sean-gilliam/msbuild