Removing visible comment from CLI docs (#2661)

Author: eyalkoren

docs/setup-attach-cli.asciidoc

@@ -61,7 +61,7 @@ java -jar apm-agent-attach-cli.jar \
 ----
 
 [float]
-[[setup-attach-cli-usage-list]] // avoids dead links in old branches
+[[setup-attach-cli-usage-list]]
 [[setup-attach-cli-usage-options]]
 ==== Options