_content/talks: delete "presentStyle" template

With no "presentStyle" template defined, the template function with
the same name (defined in the internal/web package) starts to be used
in its place. Unlike the no-op wrapper template, the template function
correctly processes some of the legacy present syntax.

Fixes golang/go#50664.

Change-Id: I8a673e511b326f5c4f8a3a2666a2d1e65b5995ce
Reviewed-on: https://go-review.googlesource.com/c/website/+/379035
Reviewed-by: Jamal Carvalho <jamalcarvalho@google.com>
Trust: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Dmitri Shuralyov <dmitshur@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
diff --git a/_content/talks/slide.tmpl b/_content/talks/slide.tmpl
index eaa2bef..8466cd0 100644
--- a/_content/talks/slide.tmpl
+++ b/_content/talks/slide.tmpl
@@ -192,5 +192,3 @@
 {{define "style" -}}
 {{presentStyle . -}}
 {{end}}
-
-{{define "presentStyle"}}{{.}}{{end}}
diff --git a/cmd/golangorg/testdata/talks.txt b/cmd/golangorg/testdata/talks.txt
index 1a1f9ed..362006f 100644
--- a/cmd/golangorg/testdata/talks.txt
+++ b/cmd/golangorg/testdata/talks.txt
@@ -7,6 +7,14 @@
 GET https://go.dev/talks/
 body contains <a href="/talks/2009">2009</a>
 
+GET https://go.dev/talks/2011/lex.slide#39
+body contains <i>(Note: This restriction was lifted in Go version 1 but the discussion is still interesting.)</i>
+body !contains _(Note:_This_restriction_was_lifted_in_Go_version_1_but_the_discussion_is_still_interesting.)_
+
 GET https://go.dev/talks/2013/bestpractices.slide
 body contains <h1>Twelve Go Best Practices</h1>
 body contains <script src='/talks/static/slides.js'></script>
+
+GET https://go.dev/talks/2017/state-of-go-may.slide#26
+body contains <a href="https://en.wikipedia.org/wiki/DWARF" target="_blank">DWARF</a>
+body !contains [[https://en.wikipedia.org/wiki/DWARF][DWARF]]