Fix Javadoc errors in the CheckedCallable

Author: artembilan

spring-integration-core/src/main/java/org/springframework/integration/util/CheckedCallable.java

@@ -35,9 +35,9 @@ public interface CheckedCallable<T, E extends Throwable> {
 	T call() throws E;
 
 	/**
-	 * Wrap the {@link #call()} into unchecked {@link Callable<T>}.
+	 * Wrap the {@link #call()} into unchecked {@link Callable}.
 	 * Re-throw its exception wrapped with a {@link IllegalStateException}.
-	 * @return the unchecked {@link Callable<T>}.
+	 * @return the unchecked {@link Callable}.
 	 */
 	default Callable<T> unchecked() {
 		return () -> {
@@ -59,9 +59,9 @@ else if (t instanceof Error error) { // NOSONAR
 	}
 
 	/**
-	 * Wrap the {@link #call()} into unchecked {@link Callable<T>}.
+	 * Wrap the {@link #call()} into unchecked {@link Callable}.
 	 * Re-throw its exception wrapped with a {@link IllegalStateException}.
-	 * @return the unchecked {@link Callable<T>}.
+	 * @return the unchecked {@link Callable}.
 	 * @deprecated since 6.5 in favor of {@link #unchecked()}.
 	 * @since 6.3.7
 	 */