style(.yaspellerrc) update spelling

- Update capitalization from AirBNB to Airbnb
- Remove duplicate SASS item from the config

Reason for the change:
- Official spelling of the brand name has changed

.yaspellerrc

@@ -41,12 +41,11 @@
     "GitHub",
     "Travis",
     "PhantomJS",
-    "AirBNB",
+    "Airbnb",
     "JSCS",
     "linting",
     "npm",
     "rootPath",
-    "SASS",
     "onRendered",
     "src",
     "visualtest",