[llvm] [NFC][SPIRV] Fix function type recovery (PR #165934)

[Alex Voicu via llvm-commits]

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@@ -153,19 +153,21 @@ static FunctionType *getOriginalFunctionType(const Function &F) {
   // so we should support this.
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AlexVlx wrote:

Removed.

https://github.com/llvm/llvm-project/pull/165934