[SYCL] Remove Sycl2017Compat(intel#14239) related diagnistics and tests

clang/include/clang/Basic/DiagnosticSemaKinds.td

@@ -12444,9 +12444,6 @@ def err_sycl_invalid_aspect_argument : Error<
 def warn_sycl_pass_by_value_deprecated 
     : Warning<"passing kernel functions by value is deprecated in SYCL 2020">,
       InGroup<Sycl2020Compat>, ShowInSystemHeader;
-def warn_sycl_pass_by_reference_future 
-    : Warning<"passing of kernel functions by reference is a SYCL 2020 extension">,
-    , ShowInSystemHeader;
 def warn_sycl_potentially_invalid_as_cast : Warning<
   "explicit cast from %0 to %1 potentially leads to an invalid address space"
   " cast in the resulting code">, InGroup<SyclStrict>,
@@ -12482,8 +12479,6 @@ def err_sycl_mismatch_group_size
 def note_sycl_kernel_declared_here : Note<"kernel declared here">;
 def err_sycl_expected_finalize_method : Error<
   "expected a 'finalize' method for the 'stream' class">;
-def ext_sycl_2020_attr_spelling : ExtWarn<
-  "use of attribute %0 is a SYCL 2020 extension">;
 def err_sycl_esimd_not_supported_for_type : Error<
   "type %0 is not supported in ESIMD context">;
 def err_sycl_taking_address_of_wrong_function : Error<

clang/test/SemaSYCL/implicit_kernel_type.cpp

@@ -29,32 +29,6 @@ int main() {
     h.single_task<InvalidKernelName1>([]() {});
   });
 
-#if defined(WARN)
-  // expected-warning@#KernelSingleTask {{SYCL 1.2.1 specification requires an explicit forward declaration for a kernel type name; your program may not be portable}}
-#elif defined(ERROR)
-  // expected-error@#KernelSingleTask {{SYCL 1.2.1 specification requires an explicit forward declaration for a kernel type name; your program may not be portable}}
-#endif
-
-  q.submit([&](handler &h) {
-  // expected-note@+2 {{fake_kernel declared here}}
-  // expected-note@+1 {{in instantiation of function template specialization}}
-    h.single_task<class fake_kernel>([]() { function(); });
-  });
-
-#if defined(WARN)
-  // expected-warning@#KernelSingleTask {{SYCL 1.2.1 specification requires an explicit forward declaration for a kernel type name; your program may not be portable}}
-#elif defined(ERROR)
-  // expected-error@#KernelSingleTask {{SYCL 1.2.1 specification requires an explicit forward declaration for a kernel type name; your program may not be portable}}
-#endif
-
-  q.submit([&](handler &h) {
-  // expected-note@+2 {{fake_kernel2 declared here}}
-  // expected-note@+1 {{in instantiation of function template specialization}}
-    h.single_task<class fake_kernel2>([]() {
-      auto l = [](auto f) { f(); };
-    });
-  });
-
   q.submit([&](handler &h) {
     h.single_task<class myWrapper>([]() { function(); });
   });