Update sycl_2020_deprecations.cpp

Author: IgorKharchikov

sycl/test/warnings/sycl_2020_deprecations.cpp

@@ -1,7 +1,4 @@
 // RUN: %clangxx %fsycl-host-only -fsyntax-only -sycl-std=2020 -Xclang -verify -Xclang -verify-ignore-unexpected=note %s -o %t.out
-// RUN: %clangxx %fsycl-host-only -fsyntax-only -Xclang -verify -Xclang -verify-ignore-unexpected=note %s -o %t.out
-// RUN: %clangxx %fsycl-host-only -fsyntax-only -sycl-std=2017 -Xclang -verify -Xclang -verify-ignore-unexpected=note %s -o %t.out
-// RUN: %clangxx %fsycl-host-only -fsyntax-only -sycl-std=1.2.1 -Xclang -verify -Xclang -verify-ignore-unexpected=note %s -o %t.out
 
 #include <CL/sycl.hpp>
 #include <sycl/ext/intel/online_compiler.hpp>