[llvm] [AMDGPU] Remove misplaced assert. (PR #154187)

[Stanislav Mekhanoshin via llvm-commits]

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@@ -2905,7 +2905,6 @@ void SIInstrInfo::insertIndirectBranch(MachineBasicBlock &MBB,
                                        MachineBasicBlock &RestoreBB,
                                        const DebugLoc &DL, int64_t BrOffset,
                                        RegScavenger *RS) const {
-  assert(RS && "RegScavenger required for long branching");
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rampitec wrote:

I.e., `RS` is unused by the code before its new location at line 2935.

https://github.com/llvm/llvm-project/pull/154187