Remove some annotations.

Author: toinehartman

rascal-lsp/src/main/java/org/rascalmpl/vscode/lsp/util/concurrent/CompletableFutureUtils.java

@@ -36,13 +36,12 @@
 import java.util.function.Function;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
-import org.checkerframework.checker.nullness.qual.PolyNull;
 
 public class CompletableFutureUtils {
     private CompletableFutureUtils() {/* hidden */ }
 
-    public static <T> CompletableFuture<@PolyNull T> completedFuture(@PolyNull T value, Executor exec) {
-        return CompletableFuture.<@PolyNull T>supplyAsync(() -> value, exec);
+    public static <T> CompletableFuture<T> completedFuture(T value, Executor exec) {
+        return CompletableFuture.supplyAsync(() -> value, exec);
     }
 
     /**

rascal-lsp/src/main/java/org/rascalmpl/vscode/lsp/util/concurrent/InterruptibleFuture.java

@@ -94,7 +94,7 @@ public <U, V> InterruptibleFuture<V> thenCombineAsync(
     }
 
     public static <T> InterruptibleFuture<T> completedFuture(T result, Executor exec) {
-        return new InterruptibleFuture<>(CompletableFutureUtils.<T>completedFuture(result, exec), () -> {});
+        return new InterruptibleFuture<>(CompletableFutureUtils.completedFuture(result, exec), () -> {});
     }
 
     /**