No bug. Drop expected number of b2g hazards to zero, r=terrence

DONTBUILD because mostly NPOTB

--HG--
extra : rebase_source : 06ca33d45445681ac8c2e32671d79409d76ca52e

js/src/devtools/rootAnalysis/expect.b2g.json

@@ -1,3 +1,3 @@
 {
-  "expect-hazards": 4
+  "expect-hazards": 0
 }