Conflicting definition of SHEAR in IfcWallTypeEnum

There is a note in the enum which says:

> The potentially misleading term SHEAR shall not impose a particular resistance against shear forces, but a particular shape.

Then, almost immediately after, the contradictory definition is made:

> A wall designed to withstand shear loads. Examples of shear wall are diaphragms inside a box girder, typically on a pier, to resist lateral forces and transfer them to the support.

So, in the spirit of PredefinedType _not_ defining shape, I propose to remove the note, and keep the description unchanged.

Start at the IfcWallTypeEnum entry in the IFC4.x specification and compare the two quoted definitions. Remove the note about SHEAR imposing a shape while retaining the definition of a wall designed to withstand shear loads; done when the enum no longer contains the contradiction.

Written by the indexing model from the issue text.