[Libomptarget][NFC] Remove warning on return value const

Author: jhuber6

openmp/libomptarget/plugins-nextgen/common/include/PluginInterface.h

@@ -1393,7 +1393,7 @@ template <typename ResourceRef> class GenericDeviceResourceManagerTy {
 };
 
 /// A static check on whether or not we support RPC in libomptarget.
-const bool libomptargetSupportsRPC();
+bool libomptargetSupportsRPC();
 
 } // namespace plugin
 } // namespace target

openmp/libomptarget/plugins-nextgen/common/src/PluginInterface.cpp

@@ -1560,7 +1560,7 @@ Expected<bool> GenericPluginTy::checkELFImage(StringRef Image) const {
   return isELFCompatible(Image);
 }
 
-const bool llvm::omp::target::plugin::libomptargetSupportsRPC() {
+bool llvm::omp::target::plugin::libomptargetSupportsRPC() {
 #ifdef LIBOMPTARGET_RPC_SUPPORT
   return true;
 #else