yuzu/software_keyboard: Remove unnecessary GetStatus() member function

Like with the profile selection dialog, we can just use the result of
QDialog's exec() function to determine whether or not a dialog was
accepted.

src/yuzu/applets/software_keyboard.h

@@ -36,10 +36,8 @@ public:
     void reject() override;
 
     std::u16string GetText() const;
-    bool GetStatus() const;
 
 private:
-    bool ok = false;
     std::u16string text;
 
     QDialogButtonBox* buttons;