SDAG: Remove the transitional default Select() implementation

In r268693, we started requiring that SelectionDAGISel::Select return
void, but provided a default implementation that did just that by
calling into the old interface. Now that all targets have been
updated, we'll just remove the default implementation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@270454 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed