RemoveUV_SmartUV_ExportFBX.py

import bpy
from math import radians

context = bpy.context
scene = context.scene
vl = context.view_layer
# deselect all to make sure select one at a time
bpy.ops.object.select_all(action='DESELECT')

for obj in scene.objects:
    if (obj.type == 'MESH'):
        #Remove Original UV
        uv_textures = obj.data.uv_textures
        uv_textures.remove(uv_textures[0])
        
        #Create new UV using Smart UV Project
        vl.objects.active = obj
        obj.select_set(True)
        print(obj.name)
        lm =  obj.data.uv_layers.get("LightMap")
        if not lm:
            lm = obj.data.uv_layers.new(name="LightMap")
        lm.active = True
        bpy.ops.object.editmode_toggle()
        bpy.ops.mesh.select_all(action='SELECT') # for all faces
        bpy.ops.uv.smart_project(angle_limit=66, island_margin = 0.03)
        bpy.ops.object.editmode_toggle()
        obj.select_set(False)
        
        #Export FBX
        bpy.ops.export_scene.fbx(check_existing=False,
        filepath=scene.export_folder + "/" + obj.name + ".fbx",
        filter_glob="*.fbx",
        use_selection=True,
        use_armature_deform_only=True,
        bake_space_transform=scene.apply_transform,
        mesh_smooth_type=scene.export_smoothing,
        add_leaf_bones=False,
        path_mode='ABSOLUTE')