[llvm-commits] [PATCH] remove unused STL header includes

[Jay Foad]

These patches remove unnecessary #includes of STL header files. Found
by grepping for e.g. "#include <vector>" in files that don't mention
std::vector. (And no files should be using "using namespace std",
according to the coding standards.)

Tested with "make all check-all", LLVM and Clang, on my Ubuntu system.
I suppose there is a chance that the headers on my system are a bit
more permissive than they need to be, and I've removed some #includes
that are technically still required, but that seems fairly unlikely to
me.

OK to commit?

I was inspired by:

http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20110411/119566.html

which showed that pulling in unneeded header files could have a
noticeable effect on build times.

Thanks,
Jay.
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