Fix one instance of incorrect nullability of type argument in FluentIterable.

RELNOTES=n/a
PiperOrigin-RevId: 678224792

Author: java-team-github-bot

android/guava/src/com/google/common/collect/FluentIterable.java

@@ -465,9 +465,9 @@ public final boolean allMatch(Predicate<? super E> predicate) {
    *
    * <p><b>{@code Stream} equivalent:</b> {@code stream.filter(predicate).findFirst()}.
    */
-  @SuppressWarnings("nullness") // Unsafe, but we can't do much about it now.
   public final Optional<@NonNull E> firstMatch(Predicate<? super E> predicate) {
-    return Iterables.<E>tryFind((Iterable<@NonNull E>) getDelegate(), predicate);
+    // Unsafe, but we can't do much about it now.
+    return Iterables.<@NonNull E>tryFind((Iterable<@NonNull E>) getDelegate(), predicate);
   }
 
   /**

guava/src/com/google/common/collect/FluentIterable.java

@@ -462,9 +462,9 @@ public final boolean allMatch(Predicate<? super E> predicate) {
    *
    * <p><b>{@code Stream} equivalent:</b> {@code stream.filter(predicate).findFirst()}.
    */
-  @SuppressWarnings("nullness") // Unsafe, but we can't do much about it now.
   public final Optional<@NonNull E> firstMatch(Predicate<? super E> predicate) {
-    return Iterables.<E>tryFind((Iterable<@NonNull E>) getDelegate(), predicate);
+    // Unsafe, but we can't do much about it now.
+    return Iterables.<@NonNull E>tryFind((Iterable<@NonNull E>) getDelegate(), predicate);
   }
 
   /**