Compiler: remove dead code in limitExpressionComplexity
Compiler: remove dead code in limitExpressionComplexity

TGraphTraverser is a class that does nothing by itself so the for loop
was a noop statement and has been for at least two years (since
17732823f9c2, didn't check earlier).

BUG=angleproject:591

Change-Id: I1919059fcb8987c2f043a71fed6223e16bc014d8
Reviewed-on: https://chromium-review.googlesource.com/316600
Tryjob-Request: Corentin Wallez <470c533e86f4f848c98c7e11fffc2d043494a401@chromium.org>
Reviewed-by: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>
Reviewed-by: Geoff Lang <b6fc25fe0362055230985c05cbfa8adb741ccc0f@chromium.org>
Tested-by: Corentin Wallez <470c533e86f4f848c98c7e11fffc2d043494a401@chromium.org>

MSOpenTech/angle,ppy/angle,mlfarrell/angle,ecoal95/angle,ppy/angle,mikolalysenko/angle,domokit/waterfall,ppy/angle,mikolalysenko/angle,ecoal95/angle,mlfarrell/angle,ecoal95/angle,mikolalysenko/angle,ecoal95/angle,MSOpenTech/angle,mlfarrell/angle,domokit/waterfall,mikolalysenko/angle,MSOpenTech/angle,ecoal95/angle,MSOpenTech/angle,mlfarrell/angle,ppy/angle