Remove management.observations.long-task-timer.enabled

This commit removes the m.observations.long-task-timer.enabled
property in favor of the existing m.metrics.observations.ignored-meters
property.

Closes gh-45725

module/spring-boot-micrometer-observation/src/main/java/org/springframework/boot/micrometer/observation/autoconfigure/ObservationProperties.java

@@ -45,8 +45,6 @@ public class ObservationProperties {
 	 */
 	private Map<String, Boolean> enable = new LinkedHashMap<>();
 
-	private final LongTaskTimer longTaskTimer = new LongTaskTimer();
-
 	public Map<String, Boolean> getEnable() {
 		return this.enable;
 	}
@@ -67,10 +65,6 @@ public class ObservationProperties {
 		this.keyValues = keyValues;
 	}
 
-	public LongTaskTimer getLongTaskTimer() {
-		return this.longTaskTimer;
-	}
-
 	public static class Http {
 
 		private final Client client = new Client();
@@ -141,21 +135,4 @@ public class ObservationProperties {
 
 	}
 
-	public static class LongTaskTimer {
-
-		/**
-		 * Whether to create a LongTaskTimer for every observation.
-		 */
-		private boolean enabled = true;
-
-		public boolean isEnabled() {
-			return this.enabled;
-		}
-
-		public void setEnabled(boolean enabled) {
-			this.enabled = enabled;
-		}
-
-	}
-
 }

module/spring-boot-micrometer-observation/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -8,10 +8,8 @@
       "defaultValue": false
     },
     {
-      "name": "management.observations.annotations.long-lask-timer.enabled",
-      "type": "java.lang.boolean",
-      "description": "Whether to create a LongTaskTimer for every observation.",
-      "defaultValue": true,
+      "name": "management.observations.long-task-timer.enabled",
+      "type": "java.lang.Boolean",
       "deprecation": {
         "level": "error",
         "replacement": "management.metrics.observations.ignored-meters"