How to remove all blendshape drivers in Blender 2.79?

Coding Python Support
1

I must remove all drivers from all shapekeys on the selected mesh in Blender 2.79. I have tested this script for 2.8 from this answer: https://blender.stackexchange.com/q/193803/32655

import bpy

fcurves = bpy.data.shape_keys["Key"].animation_data.drivers

for fc in fcurves:
    fcurves.remove(fcurves[0])

But I get an error AttributeError: 'bpy_prop_collection' object has no attribute 'remove'

It works fine in 2.8 but is it possible to accomplish with python in Blender 2.79?