remove text added by mistake

src/PostProcess/RenderPipeline/babylon.postProcessRenderPipeline.ts

@@ -1,8 +1,4 @@
 module BABYLON {
-    class PipelineChain{
-        effects: Array<PostProcessRenderEffect> = []
-        next: Array<PipelineChain> = []
-    }
     export class PostProcessRenderPipeline {
 
         private _renderEffects: {[key: string]: PostProcessRenderEffect};