Remove `mmap_rnd_bits` workaround as it's now fixed by actions.

See https://github.com/actions/runner-images/issues/9491#issuecomment-1565496278.

PiperOrigin-RevId: 718112641
diff --git a/.github/workflows/bazel_test.yml b/.github/workflows/bazel_test.yml
index 0e4389d..1862114 100644
--- a/.github/workflows/bazel_test.yml
+++ b/.github/workflows/bazel_test.yml
@@ -36,11 +36,6 @@
         config: ['default', 'fuzztest']
         compilation_mode: ['fastbuild', 'opt', 'dbg']
     steps:
-      # TODO(lszekeres): Remove once the following is fixed:
-      # https://github.com/actions/runner-images/issues/9491
-      - name: Reduce ASLR entropy as a temporary workaround
-        run: |
-          sudo sysctl -w vm.mmap_rnd_bits=28
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Install dependencies
diff --git a/.github/workflows/bazel_test_centipede.yml b/.github/workflows/bazel_test_centipede.yml
index 5ce7c6a..b39e778 100644
--- a/.github/workflows/bazel_test_centipede.yml
+++ b/.github/workflows/bazel_test_centipede.yml
@@ -35,11 +35,6 @@
       matrix:
         config: ['default', 'noriegeli', 'asan']
     steps:
-      # TODO(lszekeres): Remove once the following is fixed:
-      # https://github.com/actions/runner-images/issues/9491
-      - name: Reduce ASLR entropy as a temporary workaround
-        run: |
-          sudo sysctl -w vm.mmap_rnd_bits=28
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Install dependencies
diff --git a/.github/workflows/cmake_test.yml b/.github/workflows/cmake_test.yml
index d526bd6..f64d68b 100644
--- a/.github/workflows/cmake_test.yml
+++ b/.github/workflows/cmake_test.yml
@@ -38,11 +38,6 @@
       matrix:
         mode: ['default', 'fuzzing', 'codelab']
     steps:
-      # TODO(lszekeres): Remove once the following is fixed:
-      # https://github.com/actions/runner-images/issues/9491
-      - name: Reduce ASLR entropy as a temporary workaround
-        run: |
-          sudo sysctl -w vm.mmap_rnd_bits=28
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Install dependencies