chore: don't use nullable annotations from RxJava

config/checkstyle/checkstyle.xml

@@ -126,6 +126,9 @@
 		</module>
 		<module name="IllegalImport">
 			<property name="illegalClasses" value="jadx.core.utils.DebugUtils"/>
+			<!-- don't use nullable annotations from RxJava -->
+			<property name="illegalClasses" value="io.reactivex.rxjava3.annotations.NonNull"/>
+			<property name="illegalClasses" value="io.reactivex.rxjava3.annotations.Nullable"/>
 		</module>
 		<module name="RegexpSinglelineJava">
 			<property name="id" value="printstacktrace"/>

jadx-gui/src/main/java/jadx/gui/device/protocol/ADBDevice.java

@@ -16,8 +16,6 @@ import java.util.regex.Pattern;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import io.reactivex.rxjava3.annotations.NonNull;
-
 import jadx.core.utils.StringUtils;
 import jadx.core.utils.log.LogUtils;
 import jadx.gui.device.protocol.ADB.JDWPProcessListener;
@@ -208,7 +206,6 @@ public class ADBDevice {
 		return getProcessList("ps | grep " + pkg);
 	}
 
-	@NonNull
 	public List<Process> getProcessList() throws IOException {
 		return getProcessList("ps");
 	}

jadx-gui/src/main/java/jadx/gui/ui/action/ActionModel.java

@@ -8,8 +8,6 @@ import java.util.stream.Collectors;
 
 import javax.swing.ImageIcon;
 
-import io.reactivex.rxjava3.annotations.NonNull;
-
 import jadx.gui.utils.NLS;
 import jadx.gui.utils.UiUtils;
 import jadx.gui.utils.shortcut.Shortcut;
@@ -165,7 +163,6 @@ public enum ActionModel {
 		return null;
 	}
 
-	@NonNull
 	public Shortcut getDefaultShortcut() {
 		return defaultShortcut;
 	}

jadx-gui/src/main/java/jadx/gui/ui/panel/JDebuggerPanel.java

@@ -40,11 +40,10 @@ import javax.swing.tree.DefaultTreeModel;
 import javax.swing.tree.TreeNode;
 import javax.swing.tree.TreePath;
 
+import org.jetbrains.annotations.Nullable;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import io.reactivex.rxjava3.annotations.Nullable;
-
 import jadx.core.utils.StringUtils;
 import jadx.gui.device.debugger.DebugController;
 import jadx.gui.device.protocol.ADBDevice;