More polishing

Author: aelovikov-intel

sycl/source/detail/event_impl.cpp

@@ -142,6 +142,7 @@ void event_impl::setHandle(const ur_event_handle_t &UREvent) {
 
 context_impl &event_impl::getContextImpl() {
   initContextIfNeeded();
+  assert(MContext && "Trying to get context from a host event!");
   return *MContext;
 }
 

sycl/source/detail/kernel_impl.hpp

@@ -233,7 +233,6 @@ class kernel_impl {
   bool isInterop() const { return MIsInterop; }
 
   ur_program_handle_t getProgramRef() const { return MProgram; }
-  ContextImplPtr getContextImplPtr() const { return MContext; }
   context_impl &getContextImpl() const { return *MContext; }
 
   std::mutex &getNoncacheableEnqueueMutex() const {