removed bad aiScene / material implementations, which someone added

because of linker problems. Also removed misleading comment, as proper
linking is the right way to go here

PluginCollection-FilePlugins/Plugin-Assimp/AssimpPlugin.cc

@@ -45,68 +45,6 @@
 
 #include "AssimpPlugin.hh"
 
-/*
- * we have to implement our own aiScene and aiMaterial constructor/destructor
- * since the linker cannot find the corresponding symbols from the
- * assimp library
- */
-
-aiMaterial::aiMaterial() {
-  mNumAllocated = 0;
-  mNumProperties = 0;
-  mProperties = NULL;
-}
-aiMaterial::~aiMaterial() {
-  for (unsigned int i = 0; i < mNumProperties; ++i)
-    delete mProperties[i];
-  delete[] mProperties;
-}
-
-aiScene::aiScene() {
-    mFlags = 0;
-    mRootNode = NULL;
-    mNumMeshes = 0;
-    mMeshes = NULL;
-    mNumMaterials = 0;
-    mMaterials = NULL;
-    mNumAnimations = 0;
-    mAnimations = NULL;
-    mNumTextures = 0;
-    mTextures = NULL;
-    mNumLights = 0;
-    mLights = NULL;
-    mNumCameras = 0;
-    mCameras = NULL;
-}
-aiScene::~aiScene() {
-  delete mRootNode;
-
-  for (unsigned int i = 0; i < mNumMeshes; ++i)
-    delete mMeshes[i];
-  delete[] mMeshes;
-
-  for (unsigned int i = 0; i < mNumMaterials; ++i)
-    delete mMaterials[i];
-  delete[] mMaterials;
-
-  for (unsigned int i = 0; i < mNumAnimations; ++i)
-    delete mAnimations[i];
-  delete[] mAnimations;
-
-  for (unsigned int i = 0; i < mNumTextures; ++i)
-    delete mTextures[i];
-  delete[] mTextures;
-
-  for (unsigned int i = 0; i < mNumLights; ++i)
-    delete mLights[i];
-  delete[] mLights;
-
-  for (unsigned int i = 0; i < mNumCameras; ++i)
-    delete mCameras[i];
-  delete[] mCameras;
-}
-
-
 AssimpPlugin::AssimpPlugin()
   :
   loadOptions_(0),