dt-bindings: tas2562: Remove tas2562 text file

Remove the tas2562 text file as the tas2562.yaml is now available.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Link: https://lore.kernel.org/r/20200817172151.26564-1-dmurphy@ti.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/tas2562.txt

-Texas Instruments TAS2562 Smart PA
-
-The TAS2562 is a mono, digital input Class-D audio amplifier optimized for
-efficiently driving high peak power into small loudspeakers.
-Integrated speaker voltage and current sense provides for
-real time monitoring of loudspeaker behavior.
-
-Required properties:
- - #address-cells  - Should be <1>.
- - #size-cells     - Should be <0>.
- - compatible:	   - Should contain "ti,tas2562", "ti,tas2563".
- - reg:		   - The i2c address. Should be 0x4c, 0x4d, 0x4e or 0x4f.
- - ti,imon-slot-no:- TDM TX current sense time slot.
- - ti,vmon-slot-no:- TDM TX voltage sense time slot. This slot must always be
-		     greater then ti,imon-slot-no.
-
-Optional properties:
-- interrupt-parent: phandle to the interrupt controller which provides
-                    the interrupt.
-- interrupts: (GPIO) interrupt to which the chip is connected.
-- shut-down-gpio: GPIO used to control the state of the device.
-
-Examples:
-tas2562@4c {
-        #address-cells = <1>;
-        #size-cells = <0>;
-        compatible = "ti,tas2562";
-        reg = <0x4c>;
-
-        interrupt-parent = <&gpio1>;
-        interrupts = <14>;
-
-	shut-down-gpio = <&gpio1 15 0>;
-        ti,imon-slot-no = <0>;
-        ti,vmon-slot-no = <1>;
-};
-