[CI] Don't trigger build on pull_request, on push already covers it

Author: ViliusSutkus89

.github/workflows/build.yml

@@ -28,11 +28,6 @@ on:
       - '**.md'
       - '.github/**'
       - '!.github/workflows/build.yml'
-  pull_request:
-    paths-ignore:
-      - '**.md'
-      - '.github/**'
-      - '!.github/workflows/build.yml'
 
 permissions:
   actions: none