FIX: linter warnings

Author: reneme

recipes/botan/all/conanfile.py

@@ -1,10 +1,9 @@
-import glob
 import os
 import shutil
 
 from conan import ConanFile
 from conan.errors import ConanInvalidConfiguration
-from conan.tools.apple import is_apple_os, XCRun
+from conan.tools.apple import is_apple_os, fix_apple_shared_install_name, XCRun
 from conan.tools.build import build_jobs, check_min_cppstd
 from conan.tools.env import VirtualBuildEnv
 from conan.tools.files import apply_conandata_patches, chdir, copy, export_conandata_patches, get
@@ -85,6 +84,10 @@ class BotanConan(ConanFile):
         "module_policy": None,
     }
 
+    def __init__(self):
+        super().__init__()
+        self._extra_cxxflags = None
+
     @property
     def _is_x86(self):
         return str(self.settings.arch) in ['x86', 'x86_64']