Remove support for pre-v6 styles

README.md

@@ -28,10 +28,10 @@ Will validate the given style JSON and print errors to stdout. Provide a
 ### Migrations
 
 This repo contains scripts for migrating GL styles of any version to the latest version
-(currently v5). Migrate a style like this:
+(currently v8). Migrate a style like this:
 
 ```bash
-$ gl-style-migrate bright-v0.json > bright-v5.json
+$ gl-style-migrate bright-v7.json > bright-v8.json
 ```
 
 To migrate a file in place, you can use the `sponge` utility from the `moreutils` package:

index.js

@@ -1,7 +1,3 @@
-exports.v2 = require('./reference/v2.json');
-exports.v3 = require('./reference/v3.json');
-exports.v4 = require('./reference/v4.json');
-exports.v5 = require('./reference/v5.json');
 exports.v6 = require('./reference/v6.json');
 exports.v7 = require('./reference/v7.json');
 exports.v8 = require('./reference/v8.json');

lib/migrate.js

@@ -15,27 +15,6 @@
 module.exports = function(style) {
     var migrated = false;
 
-    if (style.version === 2) {
-        style = require('../migrations/v3')(style);
-        migrated = true;
-    }
-
-    if (style.version === 3) {
-        style = require('../migrations/v4')(style);
-        style = require('../migrations/v4-bonus')(style);
-        migrated = true;
-    }
-
-    if (style.version === 4) {
-        style = require('../migrations/v5')(style);
-        migrated = true;
-    }
-
-    if (style.version === 5) {
-        style = require('../migrations/v6')(style);
-        migrated = true;
-    }
-
     if (style.version === 6) {
         style = require('../migrations/v7')(style);
         migrated = true;