refactor: remove unused imports and variables

src/kakarot/instructions/environmental_information.cairo

@@ -20,7 +20,6 @@ from kakarot.memory import Memory
 from kakarot.model import model
 from kakarot.stack import Stack
 from kakarot.state import State
-from kakarot.storages import Kakarot_cairo1_helpers_class_hash, Kakarot_evm_to_starknet_address
 from utils.array import slice
 from utils.bytes import bytes_to_bytes8_little_endian
 from utils.uint256 import uint256_to_uint160, uint256_add, uint256_eq
@@ -486,10 +485,7 @@ namespace EnvironmentalInformation {
             dst, account.code_len, account.code
         );
 
-        let (starknet_address) = Kakarot_evm_to_starknet_address.read(evm_address);
-        let code_hash = account.code_hash;
-
-        Stack.push_uint256([code_hash]);
+        Stack.push_uint256([account.code_hash]);
 
         return evm;
     }

src/kakarot/instructions/system_operations.cairo

@@ -7,13 +7,12 @@ from starkware.cairo.common.bool import TRUE, FALSE
 from starkware.cairo.common.cairo_builtins import HashBuiltin, BitwiseBuiltin
 from starkware.cairo.common.math import split_felt, unsigned_div_rem
 from starkware.cairo.common.math_cmp import is_nn, is_not_zero
-from starkware.cairo.common.registers import get_fp_and_pc, get_ap
 from starkware.cairo.common.uint256 import Uint256, uint256_lt, uint256_le
 from starkware.cairo.common.default_dict import default_dict_new
 from starkware.cairo.common.dict_access import DictAccess
 
 from kakarot.account import Account
-from kakarot.interfaces.interfaces import IAccount, ICairo1Helpers
+from kakarot.interfaces.interfaces import ICairo1Helpers
 from kakarot.constants import Constants
 from kakarot.errors import Errors
 from kakarot.evm import EVM