Delete unused algorithm interfaces for VP8 and VP9.

Change-Id: Iabfcce34a33521093d60ddc2f7d5588545d8b8e7

vpx/vp8cx.h

diff --git a/vpx/vp8cx.h b/vpx/vp8cx.h
index ec8f985..3cbb0ec 100644
--- a/vpx/vp8cx.h
+++ b/vpx/vp8cx.h
@@ -27,24 +27,6 @@
 extern "C" {
 #endif
 
-/*!\name Algorithm interface for VP8
- *
- * This interface provides the capability to encode raw VP8 streams.
- * @{
- */
-extern vpx_codec_iface_t  vpx_codec_vp8_cx_algo;
-extern vpx_codec_iface_t *vpx_codec_vp8_cx(void);
-/*!@} - end algorithm interface member group*/
-
-/*!\name Algorithm interface for VP9
- *
- * This interface provides the capability to encode raw VP9 streams.
- * @{
- */
-extern vpx_codec_iface_t  vpx_codec_vp9_cx_algo;
-extern vpx_codec_iface_t *vpx_codec_vp9_cx(void);
-/*!@} - end algorithm interface member group*/
-
 /*!\name Algorithm interface for VP10
  *
  * This interface provides the capability to encode raw VP10 streams.

vpx/vp8dx.h

diff --git a/vpx/vp8dx.h b/vpx/vp8dx.h
index 1f02fd5..4c6c19d 100644
--- a/vpx/vp8dx.h
+++ b/vpx/vp8dx.h
@@ -28,24 +28,6 @@
 /* Include controls common to both the encoder and decoder */
 #include "./vp8.h"
 
-/*!\name Algorithm interface for VP8
- *
- * This interface provides the capability to decode VP8 streams.
- * @{
- */
-extern vpx_codec_iface_t  vpx_codec_vp8_dx_algo;
-extern vpx_codec_iface_t *vpx_codec_vp8_dx(void);
-/*!@} - end algorithm interface member group*/
-
-/*!\name Algorithm interface for VP9
- *
- * This interface provides the capability to decode VP9 streams.
- * @{
- */
-extern vpx_codec_iface_t  vpx_codec_vp9_dx_algo;
-extern vpx_codec_iface_t *vpx_codec_vp9_dx(void);
-/*!@} - end algorithm interface member group*/
-
 /*!\name Algorithm interface for VP10
  *
  * This interface provides the capability to decode VP10 streams.