Update DIRECTORY.md

Author: DenizAltunkapan

DIRECTORY.md

@@ -555,7 +555,6 @@
           - 📄 [PerlinNoise](src/main/java/com/thealgorithms/others/PerlinNoise.java)
           - 📄 [PrintAMatrixInSpiralOrder](src/main/java/com/thealgorithms/others/PrintAMatrixInSpiralOrder.java)
           - 📄 [QueueUsingTwoStacks](src/main/java/com/thealgorithms/others/QueueUsingTwoStacks.java)
-          - 📄 [ReverseStackUsingRecursion](src/main/java/com/thealgorithms/others/ReverseStackUsingRecursion.java)
           - 📄 [SkylineProblem](src/main/java/com/thealgorithms/others/SkylineProblem.java)
           - 📄 [TwoPointers](src/main/java/com/thealgorithms/others/TwoPointers.java)
           - 📄 [Verhoeff](src/main/java/com/thealgorithms/others/Verhoeff.java)
@@ -1227,7 +1226,6 @@
           - 📄 [NextFitTest](src/test/java/com/thealgorithms/others/NextFitTest.java)
           - 📄 [PasswordGenTest](src/test/java/com/thealgorithms/others/PasswordGenTest.java)
           - 📄 [QueueUsingTwoStacksTest](src/test/java/com/thealgorithms/others/QueueUsingTwoStacksTest.java)
-          - 📄 [ReverseStackUsingRecursionTest](src/test/java/com/thealgorithms/others/ReverseStackUsingRecursionTest.java)
           - 📄 [SkylineProblemTest](src/test/java/com/thealgorithms/others/SkylineProblemTest.java)
           - 📄 [TestPrintMatrixInSpiralOrder](src/test/java/com/thealgorithms/others/TestPrintMatrixInSpiralOrder.java)
           - 📄 [TwoPointersTest](src/test/java/com/thealgorithms/others/TwoPointersTest.java)