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/YGBaselineFuncTest.cpp

@@ -9,7 +9,10 @@
 #include <yoga/YGNode.h>
 #include <yoga/Yoga.h>
 
-static float _baseline(YGNodeRef node, const float width, const float height) {
+static float _baseline(
+    YGNodeRef node,
+    const float /*width*/,
+    const float /*height*/) {
   float* baseline = (float*) node->getContext();
   return *baseline;
 }