doc/tutorial/basics: remove reference to % operator

Change-Id: I86279e73f546487953c50a432c1a398b8e8ecf51
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/4941
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>
diff --git a/doc/tutorial/basics/6_expressions/10_operators.txt b/doc/tutorial/basics/6_expressions/10_operators.txt
index 75051d6..79efe25 100644
--- a/doc/tutorial/basics/6_expressions/10_operators.txt
+++ b/doc/tutorial/basics/6_expressions/10_operators.txt
@@ -9,7 +9,7 @@
 CUE supports many common arithmetic and boolean operators.
 
 The operators for division and remainder are different for `int` and `float`.
-For `float` CUE supports the `/` and `%`  operators with the usual meaning.
+For `float` CUE supports the `/` operator with the usual meaning.
 For `int` CUE supports both Euclidean division (`div` and `mod`)
 and truncated division (`quo` and `rem`).