Revert "Solve JUCE_CHECK_OPENGL_ERROR false positives when closing pl…

…ug-in windows"

This reverts commit 7d371d7.

The bug was eventually solved differently in the official juce branch and this is no longer needed.
See juce-framework#88

modules/juce_opengl/juce_opengl.cpp

@@ -149,29 +149,6 @@ static void checkGLError (const char* file, const int line)
         if (e == GL_NO_ERROR)
             break;
 
-        // The GL error could be due to the window being closed in the main thread.
-        // Check whether this is the case and only if it isn't trigger an assertion failure.
-        OpenGLContext* currentContext = OpenGLContext::getCurrentContext();
-        jassert (currentContext != nullptr);
-        Component* component = currentContext->getTargetComponent();
-        if (component == nullptr)
-            break;
-        ComponentPeer* peer = component->getPeer();
-        if (peer == nullptr)
-            break;
-       #if JUCE_MAC
-        NSView* nsView = (NSView*) peer->getNativeHandle();
-        if (nsView == nullptr)
-            break;
-        NSWindow* nsWindow = [nsView window];
-        if (nsWindow == nullptr)
-            break;
-        if (! [nsWindow isVisible])
-            break;
-        if ([nsWindow hidesOnDeactivate] && ! [NSApp isActive])
-            break;
-       #endif
-
         DBG ("***** " << getGLErrorMessage (e) << "  at " << file << " : " << line);
         jassertfalse;
     }