remove duplicated source in CMakeLists.txt (#2011)
remove duplicated source in CMakeLists.txt (#2011)

Co-authored-by: Mitch Foley <ffddcb7c4b75bd20435be4fa2004d47d407977cb@chromium.org>
WebAssembly/wabt,WebAssembly/wabt,WebAssembly/wabt,WebAssembly/wabt,WebAssembly/wabt