README: Remove "Tested on" list

It was useful when we only had a couple of entries, but it's rather
pointless now that pretty much all the systems should work, and the ones
that don't should be listed in open issues on GitHub.

README.md

@@ -116,37 +116,3 @@ References
 - [sensorfw](https://git.merproject.org/mer-core/sensorfw/tree/master)
 - [android-iio-sensors-hal](https://github.com/01org/android-iio-sensors-hal)
 - [Sensor orientation on MSDN](https://msdn.microsoft.com/en-us/windows/uwp/devices-sensors/sensor-orientation)
-
-Tested on
----------
-
-- Apple MacBook Air (4,2)
-- Apple MacBook Air (6,2)
-- Apple MacBook Pro (8.2)
-- ASUS T100Chi
-- Asus Transformer Book TP500LB
-- Asus Zenbook UX31A, UX303L, UX305, UX330UA
-- Cube i9
-- Cube Mix Plus
-- Dell Inspiron 13 7000
-- Dell Venue 11 Pro (7140)
-- Dell Venue 8 Pro
-- Dell XPS 9365
-- HP Pavilion X360
-- HP Spectre x360 (Kaby Lake)
-- Huawei Matebook X Pro
-- Lenovo IdeaPad Yoga 13
-- Lenovo ThinkPad Twist
-- Lenovo X1 Carbon 2014 (rev2)
-- Lenovo X1 Tablet
-- Lenovo Yoga 2 13" and 11"
-- Lenovo Yoga 2 Pro
-- Lenovo Yoga 460
-- Lenovo Yoga 520-14IKB
-- Lenovo Yoga 710-11ISK
-- Lenovo Yoga 900
-- Lenovo IdeaTab Miix2 8
-- Microsoft Surface Pro 2
-- Onda v975w
-- Toshiba Portégé Z10t
-- Toshiba Radius 11 L10WC10C