build: remove swiftCore workaround in _add_swift_host_library

Author: compnerd

cmake/modules/AddSwift.cmake

@@ -977,17 +977,6 @@ function(_add_swift_host_library_single target name)
   target_link_directories(${target} PRIVATE
     ${library_search_directories})
 
-  # NOTE(compnerd) use the C linker language to invoke `clang` rather than
-  # `clang++` as we explicitly link against the C++ runtime.  We were previously
-  # actually passing `-nostdlib++` to avoid the C++ runtime linkage.
-  if("${SWIFTLIB_SINGLE_SDK}" STREQUAL "ANDROID")
-    set_property(TARGET "${target}" PROPERTY
-      LINKER_LANGUAGE "C")
-  else()
-    set_property(TARGET "${target}" PROPERTY
-      LINKER_LANGUAGE "CXX")
-  endif()
-
   # Do not add code here.
 endfunction()