Remove dead code.  Calculated greatest common divisor was not used at all. On top of that, LLVM+Clang mis-compiles this code because of its register allocator bug.
Remove dead code.  Calculated greatest common divisor was not used at all.
On top of that, LLVM+Clang mis-compiles this code because of its register
allocator bug.

Analyzed by:	Andrew Reilly (areilly at bigpond dot net dot au)
Reviewed by:	ariff, rdivacky
MFC after:	3 days

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