CI: {caching,test,bench}: rm default to bash

Author: Anton-Latukha

.github/workflows/bench.yml

@@ -1,9 +1,5 @@
 name: Benchmark
 
-defaults:
-  run:
-    shell: bash
-
 # See: https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#concurrency.
 concurrency:
   group: ${{ github.head_ref }}-${{ github.workflow }}

.github/workflows/caching.yml

@@ -17,10 +17,6 @@ name: Caching
 #   That is a short story why `dist-newstyle` (especially full) currently is not
 #   includded into `master` or PR caches.
 
-defaults:
-  run:
-    shell: bash
-
 # See: https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#concurrency.
 concurrency:
   group: ${{ github.head_ref }}-${{ github.workflow }}

.github/workflows/test.yml

@@ -1,9 +1,5 @@
 name: Testing
 
-defaults:
-  run:
-    shell: bash
-
 # See: https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#concurrency.
 concurrency:
   group: ${{ github.head_ref }}-${{ github.workflow }}