Apply fixes from clag-tidy misc-unused-parameters

Summary: Gets the project clean of `-Wunused-parameter`, part of `-Wextra`. Enforced as part of the build now.

Differential Revision: https://internalfb.com/D45772554

fbshipit-source-id: e7ec6f4047b3994c3615a4557ffc4f3677f9c1e6

tests/YGMeasureCacheTest.cpp

@@ -46,10 +46,10 @@ static YGSize _measureMin(
 
 static YGSize _measure_84_49(
     YGNodeRef node,
-    float width,
-    YGMeasureMode widthMode,
-    float height,
-    YGMeasureMode heightMode) {
+    float /*width*/,
+    YGMeasureMode /*widthMode*/,
+    float /*height*/,
+    YGMeasureMode /*heightMode*/) {
   int* measureCount = (int*) node->getContext();
   if (measureCount) {
     (*measureCount)++;