fix broken build

Author: mmicko

common/kernel/base_arch.h

@@ -455,9 +455,6 @@ template <typename R> struct BaseArch : ArchAPI<R>
     // Flow methods
     virtual void assignArchInfo() override {};
 
-    // HACK
-    virtual bool isPipInverting(PipId pip) const { return false; }
-
     // --------------------------------------------------------------
     // These structures are used to provide default implementations of bel/wire/pip binding. Arches might want to
     // replace them with their own, for example to use faster access structures than dict. Arches might also

himbaechel/himbaechel_api.h

@@ -131,9 +131,6 @@ struct HimbaechelAPI
     // For custom placer configuration
     virtual void configurePlacerHeap(PlacerHeapCfg &cfg) {};
 
-    // HACK
-    virtual bool isPipInverting(PipId pip) const { return false; }
-
     virtual ~HimbaechelAPI() {};
 };