Removed support for OpenGL 2

Former-commit-id: e796c333d6c2ef0550ff4427d36dcfbaf00ef924

src/Nazara/Renderer/RenderTexture.cpp

@@ -329,12 +329,6 @@ bool NzRenderTexture::AttachTexture(nzAttachmentPoint attachmentPoint, nzUInt8 i
 
 bool NzRenderTexture::Create(bool lock)
 {
-	if (!IsSupported())
-	{
-		NazaraError("Render textures not supported");
-		return false;
-	}
-
 	Destroy();
 
 	#if NAZARA_RENDERER_SAFE
@@ -742,11 +736,6 @@ bool NzRenderTexture::HasContext() const
 	return false;
 }
 
-bool NzRenderTexture::IsSupported()
-{
-	return NzOpenGL::IsSupported(nzOpenGLExtension_FrameBufferObject);
-}
-
 void NzRenderTexture::Blit(NzRenderTexture* src, NzRenderTexture* dst, nzUInt32 buffers, bool bilinearFilter)
 {
 	#if NAZARA_RENDERER_SAFE