stop building old versions

Author: Ekwav

.github/workflows/build.yml

@@ -23,14 +23,6 @@ jobs:
             branch: "1.21.10"
             minecraft_version: "1.21.10"
             fabric_version: "0.131.0+1.21.10"
-          - java: 21
-            branch: "1.21.8"
-            minecraft_version: "1.21.8"
-            fabric_version: "0.131.0+1.21.8"
-          - java: 21
-            branch: "1.21.5"
-            minecraft_version: "1.21.5"
-            fabric_version: "0.126.0+1.21.5"
     runs-on: ubuntu-22.04
     steps:
       - name: checkout repository