Tests: Remove redundant policy setting from RunCMake.try_{compile,run} cases

Since commit 1edf138506 (Tests/RunCMake: Update cmake_minimum_required
versions, 2023-02-06, v3.27.0-rc1~508^2~1) policy CMP0054 is
automatically set to NEW in these tests.

Tests/RunCMake/try_compile/LinkOptions.cmake

@@ -1,8 +1,5 @@
-
 enable_language(C)
 
-cmake_policy(SET CMP0054 NEW)
-
 set (lib_name "${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}lib${CMAKE_STATIC_LIBRARY_SUFFIX}")
 if (CMAKE_SYSTEM_NAME STREQUAL "Windows")
   if (RunCMake_C_COMPILER_ID STREQUAL "MSVC"

Tests/RunCMake/try_run/LinkOptions.cmake

@@ -1,8 +1,5 @@
-
 enable_language(C)
 
-cmake_policy(SET CMP0054 NEW)
-
 set (lib_name "${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}lib${CMAKE_STATIC_LIBRARY_SUFFIX}")
 if (CMAKE_SYSTEM_NAME STREQUAL "Windows")
   if (RunCMake_C_COMPILER_ID STREQUAL "MSVC"