Remove unused MSBuildTasks.h
Remove unused MSBuildTasks.h

Microsoft/msbuild,jeffkl/msbuild,Microsoft/msbuild,AndyGerlicher/msbuild,sean-gilliam/msbuild,AndyGerlicher/msbuild,cdmihai/msbuild,mono/msbuild,jeffkl/msbuild,mono/msbuild,AndyGerlicher/msbuild,cdmihai/msbuild,sean-gilliam/msbuild,chipitsine/msbuild,Microsoft/msbuild,chipitsine/msbuild,Microsoft/msbuild,rainersigwald/msbuild,mono/msbuild,jeffkl/msbuild,chipitsine/msbuild,chipitsine/msbuild,rainersigwald/msbuild,AndyGerlicher/msbuild,cdmihai/msbuild,rainersigwald/msbuild,sean-gilliam/msbuild,sean-gilliam/msbuild,cdmihai/msbuild,rainersigwald/msbuild,mono/msbuild,jeffkl/msbuild