Revert "client: make lief an optional dependency"

This reverts commit af930fd.

src/rpcclient/requirements.txt

@@ -8,3 +8,4 @@ dataclasses; python_version<"3.7"
 pygments
 objc_types_decoder
 pycrashreport>=0.0.8
+lief

src/rpcclient/rpcclient/darwin/darwin_lief.py

@@ -1,12 +1,8 @@
-import logging
 import plistlib
 import struct
 from typing import Mapping
 
-try:
-    import lief
-except ImportError:
-    logging.warning('failed to import lief. install seperately to use LIEF features')
+import lief
 
 from rpcclient.common import path_to_str
 from rpcclient.darwin.consts import kSecCodeMagicEntitlement

src/rpcclient/rpcclient/lief.py

@@ -1,11 +1,7 @@
-import logging
 from collections import namedtuple
 from typing import Mapping
 
-try:
-    import lief
-except ImportError:
-    logging.warning('failed to import lief. install seperately to use LIEF features')
+import lief
 
 from rpcclient.common import path_to_str