Layer flags won't change between prepare and set

Change-Id: I0f25766976e4f783066e5b6fd917d1769906e43e
diff --git a/include/hardware/hwcomposer.h b/include/hardware/hwcomposer.h
index 5488e75..0bebb98 100644
--- a/include/hardware/hwcomposer.h
+++ b/include/hardware/hwcomposer.h
@@ -97,8 +97,7 @@
      *   Indicates this layer is the framebuffer surface used as the target of
      *   OpenGL ES composition. If the HWC sets all other layers to HWC_OVERLAY
      *   or HWC_BACKGROUND, then no OpenGL ES composition will be done, and
-     *   this layer should be ignored during set(); the HWC_SKIP_LAYER flag
-     *   will indicate this case.
+     *   this layer should be ignored during set().
      *
      *   This flag (and the framebuffer surface layer) will only be used if the
      *   HWC version is HWC_DEVICE_API_VERSION_1_1 or higher. In older versions,