Prevent privilege escalation (#10232)

automerge

sdk/src/entrypoint_native.rs

@@ -154,7 +154,6 @@ pub trait InvokeContext {
         &mut self,
         message: &Message,
         instruction: &CompiledInstruction,
-        signers: &[Pubkey],
         accounts: &[Rc<RefCell<Account>>],
     ) -> Result<(), InstructionError>;
     fn get_caller(&self) -> Result<&Pubkey, InstructionError>;

sdk/src/instruction.rs

@@ -140,14 +140,6 @@ pub enum InstructionError {
     #[error("Unsupported program id")]
     UnsupportedProgramId,
 
-    /// Writable bit on account info changed, but shouldn't have
-    #[error("Writable bit on account info changed, but shouldn't have")]
-    WritableModified,
-
-    /// Signer bit on account info changed, but shouldn't have
-    #[error("Signer bit on account info changed, but shouldn't have")]
-    SignerModified,
-
     /// Cross-program invocation call depth too deep
     #[error("Cross-program invocation call depth too deep")]
     CallDepth,