remove setter for current level.

Setting the "current level" causes errors at least for "FYRTUR block-out
roller blind" devices (despite the fact that the "blindsCurrentLevel"
attribute is listed as set-able in json dump. Thinking about it setting
the current level doesnt make a whole lot of sense either.

dirigera-client-api/src/main/java/de/dvdgeisler/iot/dirigera/client/api/BlindsDeviceApi.java

@@ -32,19 +32,6 @@ public Mono<BlindsDevice> setTargetLevel(final BlindsDevice device, final Intege
                 .flatMap(d -> this.setStateAttribute(d, attributes));
     }
 
-    public Mono<BlindsDevice> setCurrentLevel(final BlindsDevice device, final Integer currentLevel) {
-        final BlindsStateAttributes attributes;
-
-        if (currentLevel < 0 || currentLevel > 100)
-            return Mono.error(new IllegalArgumentException("Target level must be between 0 and 100"));
-
-        attributes = new BlindsStateAttributes();
-        attributes.blindsCurrentLevel = currentLevel;
-
-        return this.assertCapability(device, "blindsCurrentLevel")
-                .flatMap(d -> this.setStateAttribute(d, attributes));
-    }
-
     public Mono<BlindsDevice> setState(final BlindsDevice device, final BlindsState state) {
         final BlindsStateAttributes attributes;