[llvm] Remove SDNPSideEffect from ARMcallseq_start and ARMcallseq_end (NFC) (PR #153248)

[David Green via llvm-commits]

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@@ -2203,10 +2202,6 @@ def JUMPTABLE_TBH :
 PseudoInst<(outs), (ins cpinst_operand:$instid, cpinst_operand:$cpidx,
                         i32imm:$size), NoItinerary, []>;
 
-
-// FIXME: Marking these as hasSideEffects is necessary to prevent machine DCE
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davemgreen wrote:

Yeah that is what was wondering - if this was just so old that we could remove it. Lets just remove the SDNPSideEffect for now though.

https://github.com/llvm/llvm-project/pull/153248