crypto: jitter - Remove duplicate word in comment

s/in//
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/jitterentropy.c

@@ -158,7 +158,7 @@ struct rand_data {
  * See the SP 800-90B comment #10b for the corrected cutoff for the SP 800-90B
  * APT.
  * http://www.untruth.org/~josh/sp80090b/UL%20SP800-90B-final%20comments%20v1.9%2020191212.pdf
- * In in the syntax of R, this is C = 2 + qbinom(1 − 2^(−30), 511, 2^(-1/osr)).
+ * In the syntax of R, this is C = 2 + qbinom(1 − 2^(−30), 511, 2^(-1/osr)).
  * (The original formula wasn't correct because the first symbol must
  * necessarily have been observed, so there is no chance of observing 0 of these
  * symbols.)