Revert "Added token::transfer_checked wrapper to token (#2351)" (#2352)

This reverts commit a068171.

spl/src/token.rs

@@ -33,33 +33,6 @@ pub fn transfer<'a, 'b, 'c, 'info>(
     .map_err(Into::into)
 }
 
-pub fn transfer_checked<'a, 'b, 'c, 'info>(
-    ctx: CpiContext<'a, 'b, 'c, 'info, TransferChecked<'info>>,
-    amount: u64,
-    decimals: u8,
-) -> Result<()> {
-    let ix = spl_token::instruction::transfer_checked(
-        &spl_token::ID,
-        ctx.accounts.from.key,
-        ctx.accounts.mint.key,
-        ctx.accounts.to.key,
-        ctx.accounts.authority.key,
-        &[],
-        amount,
-        decimals
-    )?;
-    solana_program::program::invoke_signed(
-        &ix, &[
-        ctx.accounts.from.clone(),
-        ctx.accounts.mint.clone(),
-        ctx.accounts.to.clone(),
-        ctx.accounts.authority.clone(),
-        ], 
-        ctx.signer_seeds
-    )
-    .map_err(Into::into)
-}
-
 pub fn mint_to<'a, 'b, 'c, 'info>(
     ctx: CpiContext<'a, 'b, 'c, 'info, MintTo<'info>>,
     amount: u64,
@@ -334,14 +307,6 @@ pub struct Transfer<'info> {
     pub authority: AccountInfo<'info>,
 }
 
-#[derive(Accounts)]
-pub struct TransferChecked<'info> {
-    pub from: AccountInfo<'info>,
-    pub mint: AccountInfo<'info>,
-    pub to: AccountInfo<'info>,
-    pub authority: AccountInfo<'info>,
-}
-
 #[derive(Accounts)]
 pub struct MintTo<'info> {
     pub mint: AccountInfo<'info>,