[clang] [StaticAnalyzer] Remove unused includes (NFC) (PR #141525)

[Kazu Hirata via cfe-commits]

kazutakahirata wrote:

> I only spotchecked, but it should be good if it still builds.
> 
> Btw, WDYT of IWYU? Maybe we could improve include hygiene for the static analyzer.

@steakhal Thanks for the review!  I personally like the IWYU approach, but the LLVM project uses a different approach -- it's OK to rely on transitive includes.

https://llvm.org/docs/CodingStandards.html#include-as-little-as-possible

For that reason, I am just removing `#include`s that `misc-include-cleaner` points out while ignoring suggestions to add more `#include`s.


https://github.com/llvm/llvm-project/pull/141525