Revert "add memset to allocated buffers"

This reverts commit 269d4b455ed0520d556612b4c0f1a507e2ce2603.

Now the overreading AVX2 CFL functions has been properly fixed by: 956e36bf864dcff19a2ccf5eb613ce0dec1ff784.

Change-Id: I98e54977569e2df298b0eed02ac35842e4221b80
diff --git a/test/cfl_test.cc b/test/cfl_test.cc
index 42e21e3..4a778cf 100644
--- a/test/cfl_test.cc
+++ b/test/cfl_test.cc
@@ -178,10 +178,6 @@
         aom_memalign(32, sizeof(uint16_t) * CFL_BUF_SQUARE));
     sub_luma_pels = reinterpret_cast<int16_t *>(
         aom_memalign(32, sizeof(int16_t) * CFL_BUF_SQUARE));
-    memset(chroma_pels_ref, 0, sizeof(int16_t) * CFL_BUF_SQUARE);
-    memset(sub_luma_pels_ref, 0, sizeof(int16_t) * CFL_BUF_SQUARE);
-    memset(chroma_pels, 0, sizeof(int16_t) * CFL_BUF_SQUARE);
-    memset(sub_luma_pels, 0, sizeof(int16_t) * CFL_BUF_SQUARE);
   }
 
   virtual void TearDown() {