Revert "Expose SpringBootCondition's logger"

Closes gh-10000

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/SpringBootCondition.java

@@ -158,12 +158,4 @@ public abstract class SpringBootCondition implements Condition {
 		return condition.matches(context, metadata);
 	}
 
-	/**
-	 * Return the {@link Log logger} used by this instance of the condition.
-	 * @return the {@link Log logger}
-	 */
-	protected final Log getLogger() {
-		return this.logger;
-	}
-
 }