Merge pull request #475 from powerapi-ng/refactor/fix-codeql-unused-import

refactor(message): Fix CodeQL `py/unused-import` warnings

Author: gfieni

src/powerapi/message.py

@@ -1,4 +1,4 @@
-# Copyright (c) 2022, INRIA
+# Copyright (c) 2022, Inria
 # Copyright (c) 2022, University of Lille
 # All rights reserved.
 #
@@ -27,16 +27,6 @@
 # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-from __future__ import annotations
-from typing import TYPE_CHECKING
-
-
-if TYPE_CHECKING:
-    from powerapi.database import BaseDB
-    from powerapi.filter import Filter
-    from powerapi.dispatcher import RouteTable
-    from powerapi.formula import FormulaActor, FormulaState
-
 
 class Message:
     """