Revert "[Ide] Fixed small issue in xml documentation lookup."

This reverts commit 7f2e6e309c3747e74d3843ed6254cace2ab4a3c1.
Revert "[Ide] Fixed some obsolete warnings from monodoc."

This reverts commit 38af572ab3dae39bde87c17bf67f6dfd90d43a11.

It doesn't work w/ the MonoDoc shipped in Mono 2.10 and for .NET.