Fix lint issues

package.json

@@ -31,6 +31,7 @@
     "ava": "^0.17.0",
     "babel-cli": "^6.18.0",
     "babel-core": "^6.21.0",
+    "babel-generator": "^6.24.0",
     "babel-plugin-transform-async-to-generator": "^6.16.0",
     "babel-plugin-transform-es2015-destructuring": "^6.19.0",
     "babel-plugin-transform-es2015-modules-commonjs": "^6.18.0",
@@ -45,10 +46,10 @@
   "dependencies": {
     "babel-traverse": "^6.21.0",
     "babylon": "^6.14.1",
+    "deasync": "^0.1.9",
     "postcss": "^5.2.8",
     "postcss-load-plugins": "^2.2.0",
-    "styled-jsx": "^0.4.0",
-    "deasync": "^0.1.9"
+    "styled-jsx": "^0.4.0"
   },
   "ava": {
     "require": [

src/babel.js

@@ -25,16 +25,16 @@ export default function ({types: t}) {
       }
     }
 
-    let source = ""
+    let source = ''
     const replacements = []
     node.expressions.forEach((e, i) => {
-      let r = `___styledjsxexpression${i}___`
+      const r = `___styledjsxexpression${i}___`
       source += node.quasis[i].value.cooked + r
       replacements.push({
         replacement: r,
         initial: `$\{${generate(e).code}}`
-      });
-    });
+      })
+    })
     source += node.quasis[node.quasis.length - 1].value.cooked
 
     return {
@@ -134,23 +134,6 @@ export default function ({types: t}) {
   }
 }
 
-function getPlaceholders(expressions) {
-  return expressions.map((e, id) => ({
-    replacement: `___styledjsxexpression${id}___`,
-    initial: `$\{${e.getSource()}}`
-  })).sort((a, b) => a.initial.length < b.initial.length)
-}
-
-function addPlaceholders(replacements, src) {
-  return replacements.reduce((src, currentReplacement) => {
-    src = src.replace(
-      currentReplacement.initial,
-      currentReplacement.replacement
-    )
-    return src
-  }, src)
-}
-
 function replacePlaceholders(replacements, src) {
   return replacements.reduce((src, currentReplacement) => {
     src = src.replace(