Remove unnecessary point setup calculations
Remove unnecessary point setup calculations

SetupRoutine uses V0 == V1 == V2 when drawing points, so we don't have
to duplicate those vertices explicitly.

Bug: b/149537975
Change-Id: I723a7139f5eb5735bedb0c17796c00dc4b414fa7
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42028
Presubmit-Ready: Nicolas Capens <51edc787c30f24c4904e8ffbb5523c3a9f7a451d@google.com>
Tested-by: Nicolas Capens <51edc787c30f24c4904e8ffbb5523c3a9f7a451d@google.com>
Reviewed-by: Alexis Hétu <1c7141772178a7e80858c3db5052b328076f08f4@google.com>
Kokoro-Presubmit: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

bkaradzic/SwiftShader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,google/swiftshader,bkaradzic/SwiftShader,google/swiftshader,google/swiftshader