Drop forgotten foreign annotation test data

compiler/testData/diagnostics/foreignAnnotationsTests/java8Tests/jspecify/strictMode/Simple.fir.kt

@@ -1,40 +0,0 @@
-// JSPECIFY_STATE: strict
-// !LANGUAGE: +TypeEnhancementImprovementsInStrictMode
-
-// FILE: Simple.java
-import org.jspecify.nullness.*;
-
-@NullMarked
-public class Simple {
-    @Nullable public Derived field = null;
-
-    @Nullable
-    public Derived foo(Derived x, @NullnessUnspecified Base y) {
-        return null;
-    }
-
-    public Derived bar() {
-        return null;
-    }
-}
-
-// FILE: Base.java
-public class Base {}
-
-// FILE: Derived.java
-public class Derived extends Base {
-    void foo() {}
-}
-
-// FILE: main.kt
-fun main(a: Simple, x: Derived): Unit {
-    // jspecify_nullness_mismatch
-    a.foo(x, null)<!UNSAFE_CALL!>.<!>foo()
-    // jspecify_nullness_mismatch, jspecify_nullness_mismatch
-    a.foo(<!NULL_FOR_NONNULL_TYPE!>null<!>, x)<!UNSAFE_CALL!>.<!>foo()
-
-    a.bar().foo()
-
-    // jspecify_nullness_mismatch
-    a.field<!UNSAFE_CALL!>.<!>foo()
-}