bazel: remove xtask runs

- Remove license headers check - should be done by Bazel checks.
- Remove loom run.

Author: arkjedrz

.github/workflows/cargo_required.yml

@@ -92,10 +92,3 @@ jobs:
              --skip test_one_producer_multi_stealer_mt_thread \
              --skip test_one_producer_one_stealer_mt_thread \
           2>&1 | tee miri_report.txt
-
-      # ---------- LOOM ----------
-      - name: Run Atomic tests with LOOM
-        if: github.event.pull_request.draft == false
-        run: |
-          set -o pipefail
-          cargo xtask build:loom

.github/workflows/lint_fmt_clippy.yml

@@ -59,11 +59,6 @@ jobs:
         with:
           command: fmt
           args: -- --check
-      - name: check code license header (custom)
-        uses: actions-rs/cargo@v1
-        with:
-          command: xtask
-          args: check_lic
 
       - name: check clippy errors
         uses: actions-rs/cargo@v1