DV7VCS presence: clean up config

- adjust naming case
- remove redundant `step: 1` mappings
- remove icon of sensor with device class which should come with a reasonable icon already

custom_components/tuya_local/devices/zigbee_dv7vcs_human_presence_sensor.yaml

@@ -1,4 +1,4 @@
-name: human presence sensor
+name: Human presence sensor
 products:
   - id: sxm7l9xa
     name: Loginovo mmWave human presence sensor
@@ -58,7 +58,6 @@ secondary_entities:
             step: 10
   - entity: sensor
     class: distance
-    icon: "mdi:tape-measure"
     dps:
       - id: 109
         type: integer
@@ -85,7 +84,6 @@ secondary_entities:
           max: 100
         mapping:
           - scale: 10
-            step: 1
   - entity: number
     name: Fading time
     category: config