Now that the scope chain is deserialized directly from the chain of
{ScopeInfo} objects, it is no longer needed to provide a context. This
makes the {AllowsLazyCompilationWithoutContext} predicate coincide with
the more general {AllowsLazyCompilation}. Remove the former.

R=jochen@chromium.org

Review-Url: https://codereview.chromium.org/2399853002
Cr-Commit-Position: refs/heads/master@{#40042}