remove some ruff errors

pythonbpf/functions_pass.py

@@ -674,7 +674,7 @@ def assign_string_to_array(builder, target_array_ptr, source_string_ptr, array_l
     Copy a string (i8*) to a fixed-size array ([N x i8]*)
     """
     # Create a loop to copy characters one by one
-    entry_block = builder.block
+    # entry_block = builder.block
     copy_block = builder.append_basic_block("copy_char")
     end_block = builder.append_basic_block("copy_end")
 

pythonbpf/maps/__init__.py

@@ -1,2 +1,4 @@
 from .maps import HashMap, PerfEventArray
 from .maps_pass import maps_proc
+
+__all__ = ["HashMap", "PerfEventArray", "maps_proc"]

pythonbpf/structs/__init__.py

@@ -1 +1,3 @@
 from .structs_pass import structs_proc
+
+__all__ = ["structs_proc"]