remove the now obsolete heat solver warning

Author: dbochkov-flexcompute

tidy3d/components/heat/simulation.py

@@ -23,7 +23,6 @@
 from ..geometry.primitives import Sphere, Cylinder
 from ..geometry.polyslab import PolySlab
 from ..scene import Scene
-from ..heat_spec import SolidSpec
 
 from ..bc_placement import StructureBoundary, StructureStructureInterface
 from ..bc_placement import StructureSimulationBoundary, SimulationBoundary
@@ -206,37 +205,6 @@ def names_exist_sources(cls, val, values):
                     )
         return val
 
-    """ Post-init validators """
-
-    def _post_init_validators(self) -> None:
-        """Call validators taking z`self` that get run after init."""
-        self._warn_multiple_zones()
-
-    def _warn_multiple_zones(self):
-        """Warn about current restriction on number of adjacent zones."""
-
-        struc_src_map = {}
-        for source in self.sources:
-            for name in source.structures:
-                struc_src_map[name] = source
-
-        unique_solid_zones = {
-            (struc.medium.heat_spec, struc_src_map.get(struc.name, None))
-            for struc in self.structures
-            if isinstance(struc.medium.heat_spec, SolidSpec)
-        }
-
-        if isinstance(self.medium.heat_spec, SolidSpec):
-            unique_solid_zones.add((self.medium.heat_spec, None))
-
-        if len(unique_solid_zones) > 2:
-            log.warning(
-                "More than 2 different solid zones (zone = medium + source) are detected in the heat "
-                "simulation. Make sure no more than 2 solid zones are adjacent to each other anywhere "
-                "in the simulation domain. The simulation results may be inaccurate otherwise. "
-                "This restriction will be removed in the upcoming Tidy3D versions."
-            )
-
     @equal_aspect
     @add_ax_if_none
     def plot_heat_conductivity(