program: remove duplicate immutable owner code

Author: crispheaney

programs/drift/src/instructions/admin.rs

@@ -163,16 +163,6 @@ pub fn handle_initialize_spot_market(
         )?;
     }
 
-    let is_token_2022 = *ctx.accounts.spot_market_mint.to_account_info().owner == Token2022::id();
-    if is_token_2022 {
-        initialize_immutable_owner(&ctx.accounts.token_program, &ctx.accounts.spot_market_vault)?;
-
-        initialize_immutable_owner(
-            &ctx.accounts.token_program,
-            &ctx.accounts.insurance_fund_vault,
-        )?;
-    }
-
     initialize_token_account(
         &ctx.accounts.token_program,
         &ctx.accounts.spot_market_vault,