remove extra config files

.bowerrc

-{
-  "directory": "bower_components"
-}

.jshintrc

-{
-    "esnext": true,
-    "bitwise": true,
-    "camelcase": true,
-    "curly": true,
-    "eqeqeq": true,
-    "immed": true,
-    "indent": 4,
-    "latedef": true,
-    "newcap": true,
-    "noarg": true,
-    "quotmark": "single",
-    "undef": true,
-    "unused": true,
-    "strict": true,
-    "trailing": true,
-    "smarttabs": true,
-    "white": true
-}

.yo-rc.json

-{
-  "generator-reveal": {
-    "presentationTitle": "Template R3 slides",
-    "packageVersion": "0.0.1",
-    "useSass": false
-  }
-}