content: remove unnecessary ampersand

This example showed an interface being satisfied by *T when
the method is declared on T.

Fixes golang/go#14344

Change-Id: Ifcfd251d57323714539a90e17fdb1e74531e3424
Reviewed-on: https://go-review.googlesource.com/19531
Reviewed-by: Katrina Owen <katrina.owen@gmail.com>
Reviewed-by: Andrew Gerrand <adg@golang.org>

content/methods/interfaces-are-satisfied-implicitly.go

diff --git a/content/methods/interfaces-are-satisfied-implicitly.go b/content/methods/interfaces-are-satisfied-implicitly.go
index 4bc2232..23f4539 100644
--- a/content/methods/interfaces-are-satisfied-implicitly.go
+++ b/content/methods/interfaces-are-satisfied-implicitly.go
@@ -19,6 +19,6 @@
 }
 
 func main() {
-	var i I = &T{"hello"}
+	var i I = T{"hello"}
 	i.M()
 }