dt-bindings: thermal: Drop db8500-thermal.txt

deleted file mode 100644
index 2e1c06fad81f..000000000000
@@ -1,44 +0,0 @@
-* ST-Ericsson DB8500 Thermal
-
-** Thermal node properties:
-
-- compatible : "stericsson,db8500-thermal";
-- reg : address range of the thermal sensor registers;
-- interrupts : interrupts generated from PRCMU;
-- interrupt-names : "IRQ_HOTMON_LOW" and "IRQ_HOTMON_HIGH";
-- num-trips : number of total trip points, this is required, set it 0 if none,
-  if greater than 0, the following properties must be defined;
-- tripN-temp : temperature of trip point N, should be in ascending order;
-- tripN-type : type of trip point N, should be one of "active" "passive" "hot"
-  "critical";
-- tripN-cdev-num : number of the cooling devices which can be bound to trip
-  point N, this is required if trip point N is defined, set it 0 if none,
-  otherwise the following cooling device names must be defined;
-- tripN-cdev-nameM : name of the No. M cooling device of trip point N;
-
-Usually the num-trips and tripN-*** are separated in board related dts files.
-
-Example:
-thermal@801573c0 {
-	compatible = "stericsson,db8500-thermal";
-	reg = <0x801573c0 0x40>;
-	interrupts = <21 0x4>, <22 0x4>;
-	interrupt-names = "IRQ_HOTMON_LOW", "IRQ_HOTMON_HIGH";
-
-	num-trips = <3>;
-
-	trip0-temp = <75000>;
-	trip0-type = "active";
-	trip0-cdev-num = <1>;
-	trip0-cdev-name0 = "thermal-cpufreq-0";
-
-	trip1-temp = <80000>;
-	trip1-type = "active";
-	trip1-cdev-num = <2>;
-	trip1-cdev-name0 = "thermal-cpufreq-0";
-	trip1-cdev-name1 = "thermal-fan";
-
-	trip2-temp = <85000>;
-	trip2-type = "critical";
-	trip2-cdev-num = <0>;
-}