remove shared pointer from JavaChecker

from #2996(it doesn't necesary fixes it as I can't reproduce it)
This just removes the shared pointer of the process from the JavaChecker

Signed-off-by: Trial97 <alexandru.tripon97@gmail.com>

launcher/java/JavaChecker.h

@@ -1,4 +1,6 @@
 #pragma once
+#include <memory>
+
 #include <QProcess>
 #include <QTimer>
 
@@ -9,7 +11,6 @@
 class JavaChecker : public Task {
     Q_OBJECT
    public:
-    using QProcessPtr = shared_qobject_ptr<QProcess>;
     using Ptr = shared_qobject_ptr<JavaChecker>;
 
     struct Result {
@@ -26,6 +27,7 @@ class JavaChecker : public Task {
     };
 
     explicit JavaChecker(QString path, QString args, int minMem = 0, int maxMem = 0, int permGen = 0, int id = 0);
+    ~JavaChecker() override = default;
 
    signals:
     void checkFinished(const Result& result);
@@ -34,8 +36,8 @@ class JavaChecker : public Task {
     virtual void executeTask() override;
 
    private:
-    QProcessPtr process;
-    QTimer killTimer;
+    std::unique_ptr<QProcess> m_process;
+    QTimer m_killTimer;
     QString m_stdout;
     QString m_stderr;