Removes type cheking flag

Author: miguelgondu

src/poli/core/chemistry/tdc_problem.py

@@ -1,14 +1,12 @@
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Literal, cast
+from typing import Literal, cast
 
 from poli.core.chemistry.data_packages import RandomMoleculesDataPackage
 from poli.core.chemistry.tdc_black_box import TDCBlackBox
 from poli.core.problem import Problem
-
-if TYPE_CHECKING:
-    from poli.objective_repository.rdkit_logp.register import LogPBlackBox
-    from poli.objective_repository.rdkit_qed.register import QEDBlackBox
+from poli.objective_repository.rdkit_logp.register import LogPBlackBox
+from poli.objective_repository.rdkit_qed.register import QEDBlackBox
 
 
 class TDCProblem(Problem):