Fix redundant memory barrier in TAA (#884)

Author: Katzeee

MiniEngine/Core/Shaders/TemporalBlendCS.hlsl

@@ -194,8 +194,6 @@ void main(uint3 DTid : SV_DispatchThreadID, uint GI : SV_GroupIndex, uint3 GTid
     uint Idx0 = GTid.x * 2 + GTid.y * kLdsPitch + kLdsPitch + 1;
     uint Idx1 = Idx0 + 1;
 
-    GroupMemoryBarrierWithGroupSync();
-
     float3 BoxMin, BoxMax;
     GetBBoxForPair(Idx0, Idx1, BoxMin, BoxMax);