[clang] [llvm] [analyzer][NFC] Remove "V2" from ArrayBoundCheckerV2.cpp (PR #126094)

[Donát Nagy via cfe-commits]

NagyDonat wrote:

I checked the buildbot reports and they are irrelevant timeouts in completely unrelated parts of the testsuite.

https://github.com/llvm/llvm-project/pull/126094