Remove runner tags - single runner, no tag filtering needed

.gitlab-ci.yml

@@ -24,8 +24,6 @@ shellcheck:
     - echo "Running ShellCheck on all .sh files..."
     - find . -name "*.sh" -not -path "./.git/*" -print0 |
         xargs -0 -r shellcheck --severity="$SHELLCHECK_SEVERITY" --format=tty
-  tags:
-    - docker
 
 bash-syntax:
   stage: lint
@@ -44,8 +42,6 @@ bash-syntax:
         exit 1
       fi
       echo "All scripts pass syntax check"
-  tags:
-    - docker
 
 # ─────────────────────────────────────────────
 # Test Stage — Ubuntu
@@ -68,8 +64,6 @@ test-ubuntu:
     - echo ""
     - echo "--- networktuning.sh --dry-run ---"
     - bash networktuning.sh --dry-run 2>&1 || true
-  tags:
-    - docker
 
 # ─────────────────────────────────────────────
 # Test Stage — RHEL
@@ -91,5 +85,3 @@ test-rhel:
     - echo ""
     - echo "--- networktuning.sh --dry-run ---"
     - bash networktuning.sh --dry-run 2>&1 || true
-  tags:
-    - docker