delete default value of WAMR_BUUILD_REF_TYPES

Author: Septa2112

build-scripts/config_common.cmake

@@ -211,10 +211,6 @@ if (NOT DEFINED WAMR_BUILD_TAIL_CALL)
   set (WAMR_BUILD_TAIL_CALL 0)
 endif ()
 
-if (NOT DEFINED WAMR_BUILD_REF_TYPES)
-  set (WAMR_BUILD_REF_TYPES 1)
-endif ()
-
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 # Compilation options to marco
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