Remove strings dependency (#27)

Author: paf31

bower.json

@@ -24,8 +24,7 @@
     "purescript-maps": "^3.3.1",
     "purescript-nullable": "^3.0.0",
     "purescript-proxy": "^2.1.0",
-    "purescript-symbols": "^3.0.0",
-    "purescript-strings": "^3.2.1"
+    "purescript-symbols": "^3.0.0"
   },
   "devDependencies": {
     "purescript-assert": "^3.0.0"