How do I hide Unit_attribute object (3) from the admin display?

admin.py:

from django.contrib import admin

from core.models import Attribute, Unit

class UnitAttributeInline(admin.TabularInline):
    model = Unit.attributes.through

@admin.register(Unit)
class UnitAdmin(admin.ModelAdmin):
    inlines = [UnitAttributeInline]

models.py:

class Attribute(models.Model):
    name = models.CharField(max_length=45)

class Unit(models.Model):
    attributes = models.ManyToManyField(Attribute)