ch_struct: remove one experimental comment

jvdp1 · jvdp1 · commit 4240f0c73b39 · 2020-07-22T18:26:25.000+02:00
diff --git a/doc/specs/stdlib_stats.md b/doc/specs/stdlib_stats.md
@@ -12,10 +12,6 @@ title: stats
 
 Experimental
 
-### Version
-
-Experimental
-
 ### Description
 
 Returns the Pearson correlation of the elements of `array` along dimension `dim` if the corresponding element in `mask` is `true`.
