ci: trim lint toolchain to flint stack

Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

Author: zeitlinger

.github/config/.yamllint.yml

@@ -1,19 +1,8 @@
 [tools]
 
-# Linters
-actionlint = "1.7.12"
-biome = "2.4.12"
-"aqua:owenlamont/ryl" = "0.7.0"
-editorconfig-checker = "3.6.1"
-"github:google/google-java-format" = "1.35.0"
 "github:grafana/flint" = "0.21.0"
-"github:jonwiggins/xmloxide" = "0.4.2"
-"github:koalaman/shellcheck" = "0.11.0"
-ktlint = "1.8.0"
 lychee = "0.24.2"
-"pipx:codespell" = "2.4.2"
 rumdl = "0.1.83"
-shfmt = "3.13.1"
 
 [env]
 FLINT_CONFIG_DIR = ".github/config"