ci: always run both Linux and macOS builds

PR quality checks require both builds, so we need to run them even
if there are no changes related to one or both systems.

.github/workflows/build_linux.yml

@@ -3,19 +3,7 @@ name: build-linux
 on:
   push:
     branches: [ master ]
-    paths-ignore:
-      - '.github/workflows/*macos.yml'
-      - 'docs/**'
-      - '.clang-format'
-      - '.gitignore'
-      - 'README.md'
   pull_request:
-    paths-ignore:
-      - '.github/workflows/*macos.yml'
-      - 'docs/**'
-      - '.clang-format'
-      - '.gitignore'
-      - 'README.md'
 
 concurrency:
   group: ${{

.github/workflows/build_macos.yml

@@ -3,19 +3,8 @@ name: build-macos
 on:
   push:
     branches: [ master ]
-    paths-ignore:
-      - '.github/workflows/*linux.yml'
-      - 'docs/**'
-      - '.clang-format'
-      - '.gitignore'
-      - 'README.md'
   pull_request:
-    paths-ignore:
-      - '.github/workflows/*linux.yml'
-      - 'docs/**'
-      - '.clang-format'
-      - '.gitignore'
-      - 'README.md'
+
 concurrency:
   group: ${{
     ( github.ref == 'refs/heads/master' &&