Revert "Add short aliases for '--add' and '--remove' options in "mete…

…or authorized""

This reverts commit 32fc06e.

As Glasser points out, our command option parsing is such that all `-a`
flags for commands have to be consistent in whether they are boolean or
not. Since we could easily imagine wanting a boolean `-a` or `-r` flag
in the future, we should be careful about adding these aliases. We'll
update the docs to remove `-a` and `-r` instead.

tools/commands.js

@@ -945,8 +945,8 @@ main.registerCommand({
   minArgs: 1,
   maxArgs: 1,
   options: {
-    add: { type: String, short: "a" },
-    remove: { type: String, short: "r" },
+    add: { type: String },
+    remove: { type: String },
     list: { type: Boolean }
   }
 }, function (options) {