e58b21197e4895ea4dfada639e8483d3acb82ec9 Fix: -api destroy() wasn't…

… removing the extra markup used by DataTables for headers and sorting

Fix: `-api destroy()` wasn't removing automatic column classes
Fix: `-api destroy()` wasn't removing attributes that had been added to the header cells.

https://datatables.net/forums/discussion/80456

Sync to source repo @e58b21197e4895ea4dfada639e8483d3acb82ec9

datatables.json

@@ -14,5 +14,5 @@
     ],
     "src-repo": "http://github.com/DataTables/DataTablesSrc",
     "last-tag": "2.2.1",
-    "last-sync": "5775734c93eb8f1b82c590673ab82d20deeca69f"
+    "last-sync": "e58b21197e4895ea4dfada639e8483d3acb82ec9"
 }