Updated obsolete comments

Change-Id: If46367ce63f2c95eb39c7c295e53cc1af59a2571
diff --git a/aom/aomcx.h b/aom/aomcx.h
index b566d24..d614bd7 100644
--- a/aom/aomcx.h
+++ b/aom/aomcx.h
@@ -173,9 +173,9 @@
 
   /*!\brief Codec control function to set encoder internal speed settings.
    *
-   * Changes in this value influences, among others, the encoder's selection
-   * of motion estimation methods. Values greater than 0 will increase encoder
-   * speed at the expense of quality.
+   * Changes in this value influences the complexity of algorithms used in
+   * encoding process, values greater than 0 will increase encoder speed at
+   * the expense of quality.
    *
    * \note Valid range: 0..8
    */
diff --git a/av1/av1_cx_iface.c b/av1/av1_cx_iface.c
index ecd15dd..6cacd8c 100644
--- a/av1/av1_cx_iface.c
+++ b/av1/av1_cx_iface.c
@@ -30,7 +30,7 @@
 #define MAX_NUM_ENHANCEMENT_LAYERS 3
 
 struct av1_extracfg {
-  int cpu_used;  // available cpu percentage in 1/16
+  int cpu_used;
   unsigned int enable_auto_alt_ref;
   unsigned int enable_auto_bwd_ref;
   unsigned int noise_sensitivity;