Cleanup unused code and dependencies.

Author: Lichtso

Diff for: Cargo.lock

@@ -15,7 +15,6 @@ bincode = { workspace = true }
 libsecp256k1 = { workspace = true }
 num-traits = { workspace = true }
 qualifier_attr = { workspace = true }
-scopeguard = { workspace = true }
 solana-account = { workspace = true }
 solana-account-info = { workspace = true }
 solana-big-mod-exp = { workspace = true }

Diff for: programs/bpf_loader/Cargo.toml

@@ -1,7 +1,6 @@
 use {
     super::*,
     agave_feature_set::{self as feature_set, enable_bpf_loader_set_authority_checked_ix},
-    scopeguard::defer,
     solana_loader_v3_interface::instruction as bpf_loader_upgradeable,
     solana_measure::measure::Measure,
     solana_program_runtime::{
@@ -368,19 +367,6 @@ impl<'a, 'b> CallerAccount<'a, 'b> {
             ref_to_len_in_vm,
         })
     }
-
-    fn realloc_region(
-        &self,
-        memory_mapping: &'b MemoryMapping<'_>,
-        is_loader_deprecated: bool,
-    ) -> Result<Option<&'a MemoryRegion>, Error> {
-        account_realloc_region(
-            memory_mapping,
-            self.vm_data_addr,
-            self.original_data_len,
-            is_loader_deprecated,
-        )
-    }
 }
 
 type TranslatedAccounts<'a, 'b> = Vec<(IndexOfAccount, Option<CallerAccount<'a, 'b>>)>;