Remove non-standard "type annotations"

Since we're not actually using Flow.

lib/config.js

@@ -2,18 +2,18 @@ import fs from 'fs';
 
 export class Config {
   
-  constructor(path:string, data:object = {}) {
+  constructor(path, data = {}) {
     this.path = path;
     this.data = data;
   }
   
-  get(key:string) {
+  get(key) {
     this.validateKey(key);
     let [providerName, keyName] = key.split(".");
     return this.data[providerName] && this.data[providerName][keyName];
   }
   
-  set(key:string, value:object) {
+  set(key, value) {
     this.validateKey(key);
     let [providerName, keyName] = key.split(".");
     this.data[providerName] = this.data[providerName] || {};
@@ -21,12 +21,12 @@ export class Config {
     this.save();
   }
   
-  validateKey(key:string) {
+  validateKey(key) {
     if (key.split(".").length != 2)
       throw new Error(`The config key '${key}' is invalid. Configuration keys must be in the form [my-provider].[myKey]`);
   }
   
-  static load(configPath: string): Config {
+  static load(configPath) {
     // load up the previous config if found
     if (fs.existsSync(configPath))
       return new Config(configPath, JSON.parse(fs.readFileSync(configPath)));