The only instantiation of SwHTMLFormPendingStackData_Impl is long gone

...since ff09ed094d6b1d9b41f482a5b349c4fd9e80d857 "INTEGRATION: CWS
ab53: #i47763# synchronous html import," so lets hope that SetPendingControlSize
was indeed a leftover that would never have been called.

Change-Id: I63f91fbde4dd3162bacdb935e8b0f1e590f1d378