Let compiler generate destructors

These destructors call a function that does nothing that the
destructors for each member already do so there's no value in calling
it.

src/SFML/Audio/InputSoundFile.cpp

@@ -66,11 +66,7 @@ InputSoundFile::InputSoundFile() = default;
 
 
 ////////////////////////////////////////////////////////////
-InputSoundFile::~InputSoundFile()
+InputSoundFile::~InputSoundFile() = default;
-{
-    // Close the file in case it was open
-    close();
-}
 
 
 ////////////////////////////////////////////////////////////

src/SFML/Audio/OutputSoundFile.cpp

@@ -37,11 +37,7 @@ OutputSoundFile::OutputSoundFile() = default;
 
 
 ////////////////////////////////////////////////////////////
-OutputSoundFile::~OutputSoundFile()
+OutputSoundFile::~OutputSoundFile() = default;
-{
-    // Close the file in case it was open
-    close();
-}
 
 
 ////////////////////////////////////////////////////////////