Removes any called lambdas and blocks from
This function will rename all the variables in
comp in a single walk of the
AST, then replace called lambdas with blocks in another walk, since this
transformation interacts with scope in delicate ways. It will chain inlining
the blocks and collapsing the selection-from-tuple pattern together into a
building_blocks.ComputationBuildingBlock from which we
want to remove called lambdas and blocks.
A transformed version of
comp which has no called lambdas or blocks, and
no extraneous selections from tuples.