gmock_cook_book.md: Delete superfluous statement from 2014.

PiperOrigin-RevId: 454677195
Change-Id: I7a1419e22d617db41a5c310bc6f6158ba4cec1ab

docs/gmock_cook_book.md

@@ -392,8 +392,7 @@ Old macros and their new equivalents:
 If a mock method has no `EXPECT_CALL` spec but is called, we say that it's an
 "uninteresting call", and the default action (which can be specified using
 `ON_CALL()`) of the method will be taken. Currently, an uninteresting call will
-also by default cause gMock to print a warning. (In the future, we might remove
-this warning by default.)
+also by default cause gMock to print a warning.
 
 However, sometimes you may want to ignore these uninteresting calls, and
 sometimes you may want to treat them as errors. gMock lets you make the decision