further removing

src/Engines/Extensions/engine.multiRender.ts

@@ -231,7 +231,6 @@ ThinEngine.prototype.createMultipleRenderTarget = function(size: any, options: I
         texture._generateStencilBuffer = generateStencilBuffer;
         texture._attachments = attachments;
         texture._textureArray = textures;
-        texture._textureCount = textureCount;
 
         this._internalTexturesCache.push(texture);
     }

src/Materials/Textures/internalTexture.ts

@@ -197,8 +197,6 @@ export class InternalTexture {
     /** @hidden */
     public _textureArray: Nullable<InternalTexture[]> = null;
     /** @hidden */
-    public _textureCount: Nullable<number> = null;
-    /** @hidden */
     public _cachedCoordinatesMode: Nullable<number> = null;
     /** @hidden */
     public _cachedWrapU: Nullable<number> = null;