Remove `CyclicInitializationError` from Dart Language Specification

[sgrekhov]

CyclicInitializationError is deprecated and removed from Dart 3.0. But Dart Language specification still has a reference to CyclicInitializationError

language/specification/dartLangSpec.tex

Line 1540 in 3f42664

a \code{CyclicInitializationError} is thrown.

[lrhn]

I believe that's because the null-safety patch to the specification has not yet landed. There is also no reference to late in the linked section.

The null safe behavior is to recurse infinitely on cyclic references in late/lazy variables, so no replacement error has been specified. (And repeat-assignment to late final variables is an unspecified error.)

[eernstg]

I believe that's because the null-safety patch to the specification has not yet landed.

Exactly, this change has already been performed in #2605.

But, in order to get #2605 landed we could take it one word at a time. ;-) @lrhn, perhaps we should just make all those small changes in tiny PRs as they come up? With a rebase across each of these tiny PRs, #2605 will simply get smaller and smaller because we have just done one small piece of it.

[eernstg]

I'll close this issue because the requested change is part of the upcoming null safety updates performed in #2605.