Un-set CMAKE_C_COMPILER_LAUNCHER and CMAKE_CXX_COMPILER_LAUNCHER in stdlib and unittests

Author: shahmishal

stdlib/CMakeLists.txt

@@ -29,9 +29,6 @@ else()
     set(CMAKE_C_COMPILER "${SWIFT_NATIVE_LLVM_TOOLS_PATH}/clang")
   endif()
 
-  set(CMAKE_C_COMPILER_LAUNCHER "")
-  set(CMAKE_CXX_COMPILER_LAUNCHER "")
-
   # The sanitizers require using the same version of the compiler for
   # everything and there are various places where we link runtime code with
   # code built by the host compiler. Disable sanitizers for the runtime for

unittests/runtime/CMakeLists.txt

@@ -20,8 +20,6 @@ if(("${SWIFT_HOST_VARIANT_SDK}" STREQUAL "${SWIFT_PRIMARY_VARIANT_SDK}") AND
       set(CMAKE_C_COMPILER "${SWIFT_NATIVE_LLVM_TOOLS_PATH}/clang")
     endif()
 
-    set(CMAKE_C_COMPILER_LAUNCHER "")
-    set(CMAKE_CXX_COMPILER_LAUNCHER "")
   endif()
 
   set(swift_runtime_test_extra_libraries)