Either person can take the other off a joint account. He could even empty and close the account completely without telling you.
I don't think there are any laws about how married people 'should' share their incomes. Lots of household have different processes, none protected by law.
If you hate asking him for money 'all the time', discuss a household account for specific purposes. A specific amount is deposited each month for household expenses.
Are you off the account as you prepare for a divorce (or he prepares without telling you)? Does he think you can't handle the responsibility? Is he hiding money from you? (He got a raise and didn't mention it because he is spending it on something else?) Does either of you have a gambling or drug problem? Does either of you spend or loan 'large' amounts of money without consulting the other?
There are LOTS of reasons, most are signs of trouble... If you are employed, you should definitely have your own account somewhere (yours, mine, ours) whether or not you permit him access to it. If you are NOT employed, I would suggest you plan to be soon -- if divorce or legal action is in your future, you'll need to be.
Plus, it's a good idea to have a checking account AND a credit card in your name alone (regardless of where the money comes from) so that you have your own credit score in the event of divorce or death.