Remove redundant assertion in fe_mul_121666_impl.

Change-Id: Ie2368dc9f6be791b7c3ad1c610dcd603634be6e4
Reviewed-on: https://boringssl-review.googlesource.com/26244
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

third_party/fiat/curve25519.c

diff --git a/third_party/fiat/curve25519.c b/third_party/fiat/curve25519.c
index ecf00e5..0fdf1d9 100644
--- a/third_party/fiat/curve25519.c
+++ b/third_party/fiat/curve25519.c
@@ -528,7 +528,6 @@
 
 // NOTE: based on fiat-crypto fe_mul, edited for in2=121666, 0, 0..
 static void fe_mul_121666_impl(uint64_t out[5], const uint64_t in1[5]) {
-  assert_fe_loose(in1);
   { const uint64_t x10 = in1[4];
   { const uint64_t x11 = in1[3];
   { const uint64_t x9 = in1[2];
@@ -578,7 +577,6 @@
   out[3] = x43;
   out[4] = x46;
   }}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}
-  assert_fe(out);
 }
 
 static void fe_mul121666(fe *h, const fe_loose *f) {
@@ -1214,7 +1212,6 @@
 
 // NOTE: based on fiat-crypto fe_mul, edited for in2=121666, 0, 0..
 static void fe_mul_121666_impl(uint32_t out[10], const uint32_t in1[10]) {
-  assert_fe_loose(in1);
   { const uint32_t x20 = in1[9];
   { const uint32_t x21 = in1[8];
   { const uint32_t x19 = in1[7];
@@ -1327,7 +1324,6 @@
   out[8] = x111;
   out[9] = x114;
   }}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}
-  assert_fe(out);
 }
 
 static void fe_mul121666(fe *h, const fe_loose *f) {