TerragenLoader: Remove unused variable

code/TerragenLoader.cpp

@@ -141,9 +141,6 @@ void TerragenImporter::InternReadFile( const std::string& pFile,
         throw DeadlyImportError( "TER: Magic string \'TERRAIN\' not found" );
 
     unsigned int x = 0,y = 0,mode = 0;
-    float rad  = 6370.f;
-    (void)rad;
-
 
     aiNode* root = pScene->mRootNode = new aiNode();
     root->mName.Set("<TERRAGEN.TERRAIN>");
@@ -187,7 +184,7 @@ void TerragenImporter::InternReadFile( const std::string& pFile,
         // mapping == 1: earth radius
         else if (!::strncmp(head,AI_TERR_CHUNK_CRAD,4))
         {
-            rad = reader.GetF4();
+            reader.GetF4();
         }
         // mapping mode
         else if (!::strncmp(head,AI_TERR_CHUNK_CRVM,4))