Fix(Linux): remove -stdlib=libc++ to fix CI build error

Author: vicajilau

example/linux/CMakeLists.txt

@@ -45,10 +45,7 @@ function(APPLY_STANDARD_SETTINGS TARGET)
   target_compile_options(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:-O3>")
   target_compile_definitions(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:NDEBUG>")
 
-  if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
-    target_compile_options(${TARGET} PRIVATE -stdlib=libc++)
-    target_link_options(${TARGET} PRIVATE -stdlib=libc++)
-  endif()
+
 endfunction()
 
 # Flutter library and tool build rules.