[llvm] Remove iOS 5 check for tailcalls on ARM (PR #133354)

[David Green via llvm-commits]

davemgreen wrote:

They all run with -mtriple=armv7-apple-ios3.0 or -mtriple=armv7-apple-ios, and are presumably now tail-folding. You will need to update the CHECK lines in the tests to match the new output.

https://github.com/llvm/llvm-project/pull/133354