[java-inspections] IDEA-360079 unused for main method modifiers

GitOrigin-RevId: 698a021a1c86d8365a113d2d1b47c085beec9489

java/java-tests/testData/ig/com/siyeh/igtest/style/unnecessary_psvm_modifier/ImplicitClassWithModifiers.java

@@ -0,0 +1,3 @@
+<warning descr="Modifier 'public' is redundant for 'main' method on Java 23-preview">public</warning> <warning descr="Modifier 'static' is redundant for 'main' method on Java 23-preview">static</warning> void main(String[] args) {
+  System.out.println("Hello World!");
+}

java/java-tests/testData/ig/com/siyeh/igtest/style/unnecessary_psvm_modifier/NormalClassWithModifiers.java

@@ -0,0 +1,13 @@
+package test;
+
+public class NormalClassWithModifiers {
+  <warning descr="Modifier 'public' is redundant for 'main' method on Java 23-preview">public</warning> static void main(String[] args) {
+    System.out.println("Hello World!");
+  }
+
+
+  public static int main() {
+    System.out.println("Hello World!");
+    return 1;
+  }
+}

java/java-tests/testData/ig/com/siyeh/igtest/style/unnecessary_psvm_modifier/NormalClassWithModifiersClassIsUsed.java

@@ -0,0 +1,7 @@
+package test;
+
+class NormalClassWithModifiersClassIsUsed {
+  public static void main(String[] args) {
+    System.out.println("Hello World!");
+  }
+}

java/java-tests/testData/ig/com/siyeh/igtest/style/unnecessary_psvm_modifier/OldJavaWithModifiers.java

@@ -0,0 +1,7 @@
+package test;
+
+public class OldJavaWithModifiers{
+  public static void main(String[] args) {
+    System.out.println("Hello World!");
+  }
+}