Blender - Delete all unlocked groups for selected/multiple objects

import bpy

# Loop through all currently selected objects
for obj in bpy.context.selected_objects:
    # Ensure the object is a mesh
    if obj.type == 'MESH':
        # Loop through vertex groups backwards to delete safely
        for vg in reversed(obj.vertex_groups):
            # Check if the group is unlocked
            if not vg.lock_weight:
                # Remove the unlocked group
                obj.vertex_groups.remove(vg)