Fix lychee.toml: restore vaadin exclude and lychee workaround cleanup

The rebase mangled the lychee config changes. This restores the
intended state: remove lychee #1729 workarounds (flint handles this),
keep vaadin exclude, add line-number anchor exclude.
Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

Author: zeitlinger

.github/config/lychee.toml

@@ -10,23 +10,22 @@ max_concurrency = 4
 include_fragments = true
 
 remap = [
-  # workaround for https://github.com/lycheeverse/lychee/issues/1729
-  "https://github.com/(.*?)/(.*?)/blob/(.*?)/(.*#.*)$ https://raw.githubusercontent.com/$1/$2/$3/$4",
   "https://docs.oracle.com/(.*)#.*$ https://docs.oracle.com/$1"
 ]
 
 # excluding links to pull requests and issues is done for performance
 # stackexchange link fails with 403 when accessed by lychee
 exclude = [
-  # workaround for https://github.com/lycheeverse/lychee/issues/1729
-  '^https://github.com/.*#issuecomment-.*$',
   '^https://github.com/open-telemetry/opentelemetry-java-instrumentation/(issues|pull)/\d+$',
   '^http://code.google.com/p/concurrentlinkedhashmap$',
   '^https://softwareengineering.stackexchange.com/questions/29727.*',
   '^https://central.sonatype.com/service/rest/repository/browse/maven-snapshots/io/opentelemetry/$',
   # new artifact, remove after 2.21.0 release
   '^https://central.sonatype.com/artifact/io.opentelemetry.instrumentation/opentelemetry-helidon-4.3$',
-  # flaky link
+  # flaky links
   '^http://www.slf4j.org.*',
-  '^https://logback.qos.ch/.*'
+  '^https://logback.qos.ch/.*',
+  '^https://vaadin.com/$',
+  # line-number anchors are rendered by JavaScript, lychee cannot verify them
+  '^https://github.com/.+/blob/.+#L\d+'
 ]