Remove obsolete enums

Change-Id: I28c04f88e2fe6ee352e9115c5ba6d2b54ed1dd95
diff --git a/av1/common/enums.h b/av1/common/enums.h
index 47259c2..e1feec4 100644
--- a/av1/common/enums.h
+++ b/av1/common/enums.h
@@ -78,19 +78,11 @@
 // u plane, and v plane
 #define FRAME_LF_COUNT 4
 #define DEFAULT_DELTA_LF_MULTI 0
-
 #define MAX_MODE_LF_DELTAS 2
 
-typedef enum COMPOUND_DIST_WEIGHT_MODE {
-  DIST,
-} COMPOUND_DIST_WEIGHT_MODE;
-
-#define COMPOUND_WEIGHT_MODE DIST
 #define DIST_PRECISION_BITS 4
 #define DIST_PRECISION (1 << DIST_PRECISION_BITS)  // 16
 
-#define FRAME_NUM_LIMIT (INT_MAX - MAX_FRAME_DISTANCE - 1)
-
 // TODO(chengchen): Temporal flag serve as experimental flag for WIP
 // bitmask construction.
 // Shall be removed when bitmask code is completely checkedin