verify old user password before proceeding to change passwords

www/common/common-hash.js

@@ -474,43 +474,6 @@ Version 1
             '/' + curvePublic.replace(/\//g, '-') + '/';
     };
 
-    // XXX consider putting Block functions in /common/outer/login-block.js
-    Hash.createBlockHash = function (href, key) {
-        if (typeof(href) !== 'string') { return; }
-        if (!(key instanceof Uint8Array)) { return; }
-
-        // TODO verify inputs
-        try { return href + '#' + Nacl.util.encodeBase64(key); }
-        catch (e) { return; }
-    };
-
-    var decodeSafeB64 = function (b64) {
-        try {
-            return Nacl.util.decodeBase64(b64.replace(/\-/g, '/'));
-        } catch (e) {
-            console.error(e);
-            return;
-        }
-    };
-
-    Hash.parseBlockHash = function (hash) {
-        if (typeof(hash) !== 'string') { return; }
-        var parts = hash.split('#');
-        if (parts.length !== 2) { return; }
-
-        try {
-            return {
-                href: parts[0],
-                keys: {
-                    symmetric: decodeSafeB64(parts[1]),
-                }
-            };
-        } catch (e) {
-            console.error(e);
-            return;
-        }
-    };
-
     // Create untitled documents when no name is given
     var getLocaleDate = function () {
         if (window.Intl && window.Intl.DateTimeFormat) {