MythUI: Fix use after free in MythUIEditBar

The call to ReleaseImages() in MythUIEditBar's dtor caused a free memory read
since SetRedraw() accesses its parent whose dtor has already been called.

Calling ReleaseImages() from MythUIEditBar's dtor also isn't necessary since the
images in m_images are children of MythUIEditBar and are automatically deleted
by Qt.

Fixes #11458, Refs #11402

mythtv/libs/libmythui/mythuieditbar.cpp

@@ -8,7 +8,6 @@ MythUIEditBar::MythUIEditBar(MythUIType *parent, const QString &name)
 
 MythUIEditBar::~MythUIEditBar(void)
 {
-    ReleaseImages();
 }
 
 void MythUIEditBar::ReleaseImages(void)