intrapred,smooth_predictor: rm unnecessary saturation

with the current max weight (255) the accumulation and rounding value
(128/256) cannot exceed the range enforced by the descale (8/9).

BUG=aomedia:1538

Change-Id: Iab258841f050d1bb8821532303ad2406e2604616

aom_dsp/intrapred.c

diff --git a/aom_dsp/intrapred.c b/aom_dsp/intrapred.c
index aed2a3c..176884d 100644
--- a/aom_dsp/intrapred.c
+++ b/aom_dsp/intrapred.c
@@ -110,7 +110,7 @@
       for (i = 0; i < 4; ++i) {
         this_pred += weights[i] * pixels[i];
       }
-      dst[c] = clip_pixel(divide_round(this_pred, log2_scale));
+      dst[c] = divide_round(this_pred, log2_scale);
     }
     dst += stride;
   }
@@ -139,7 +139,7 @@
       for (i = 0; i < 2; ++i) {
         this_pred += weights[i] * pixels[i];
       }
-      dst[c] = clip_pixel(divide_round(this_pred, log2_scale));
+      dst[c] = divide_round(this_pred, log2_scale);
     }
     dst += stride;
   }
@@ -168,7 +168,7 @@
       for (i = 0; i < 2; ++i) {
         this_pred += weights[i] * pixels[i];
       }
-      dst[c] = clip_pixel(divide_round(this_pred, log2_scale));
+      dst[c] = divide_round(this_pred, log2_scale);
     }
     dst += stride;
   }
@@ -406,6 +406,7 @@
                                            int bw, int bh,
                                            const uint16_t *above,
                                            const uint16_t *left, int bd) {
+  (void)bd;
   const uint16_t below_pred = left[bh - 1];   // estimated by bottom-left pixel
   const uint16_t right_pred = above[bw - 1];  // estimated by top-right pixel
   const uint8_t *const sm_weights_w = sm_weight_arrays + bw;
@@ -428,7 +429,7 @@
       for (i = 0; i < 4; ++i) {
         this_pred += weights[i] * pixels[i];
       }
-      dst[c] = clip_pixel_highbd(divide_round(this_pred, log2_scale), bd);
+      dst[c] = divide_round(this_pred, log2_scale);
     }
     dst += stride;
   }
@@ -438,6 +439,7 @@
                                              int bw, int bh,
                                              const uint16_t *above,
                                              const uint16_t *left, int bd) {
+  (void)bd;
   const uint16_t below_pred = left[bh - 1];  // estimated by bottom-left pixel
   const uint8_t *const sm_weights = sm_weight_arrays + bh;
   // scale = 2^sm_weight_log2_scale
@@ -458,7 +460,7 @@
       for (i = 0; i < 2; ++i) {
         this_pred += weights[i] * pixels[i];
       }
-      dst[c] = clip_pixel_highbd(divide_round(this_pred, log2_scale), bd);
+      dst[c] = divide_round(this_pred, log2_scale);
     }
     dst += stride;
   }
@@ -468,6 +470,7 @@
                                              int bw, int bh,
                                              const uint16_t *above,
                                              const uint16_t *left, int bd) {
+  (void)bd;
   const uint16_t right_pred = above[bw - 1];  // estimated by top-right pixel
   const uint8_t *const sm_weights = sm_weight_arrays + bw;
   // scale = 2^sm_weight_log2_scale
@@ -488,7 +491,7 @@
       for (i = 0; i < 2; ++i) {
         this_pred += weights[i] * pixels[i];
       }
-      dst[c] = clip_pixel_highbd(divide_round(this_pred, log2_scale), bd);
+      dst[c] = divide_round(this_pred, log2_scale);
     }
     dst += stride;
   }