Remove unnecessary cast from LLVMRustGetInstrProfIncrementIntrinsic
          #123591
        
          
      
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(Noticed while reviewing #123409.)
This particular cast appears to have been copied over from clang, but there are plenty of other call sites in clang that don't bother with a cast here, and it works fine without one.
For context,
llvm::Intrinsic::IDis a typedef forunsigned, andllvm::Intrinsic::instrprof_incrementis a member ofenum IndependentIntrinsics : unsigned.The formatting change in
unwrap(M)is the result of manually runningclang-formaton this file, and then reverting all changes other than the ones affecting these lines.