[emscripten] Remove -sWASM_BIGINT flag

This flag has been enabled by default in emscripten for a while now
so I don't think we need this here anymore.

Also remove the `-Wno-experimental` flag which is no longer needed for
`-sMEMORY64`.

Author: sbc100

CMakeLists.txt

@@ -297,21 +297,6 @@ else() # MSVC
 endif()
 
 if(EMSCRIPTEN)
-  # Note: to debug with DWARF you will usually want to enable BIGINT support, as
-  # that helps avoid running Binaryen on the wasm after link. Binaryen's DWARF
-  # rewriting has known limitations, so avoiding it during link is recommended
-  # where possible (like local debugging).
-  #
-  # Note that this is debug info for Binaryen itself, that is, when you are
-  # debugging Binaryen source code. This flag has no impact on what Binaryen
-  # does when run on wasm files.
-  option(ENABLE_BIGINT "Enable wasm BigInt support" OFF)
-  if(ENABLE_BIGINT)
-    add_link_flag("-sWASM_BIGINT")
-   else()
-    add_link_flag("-sWASM_BIGINT=0")
-  endif()
-
   if("${CMAKE_BUILD_TYPE}" MATCHES "Release")
     # Extra check that cmake has set -O3 in its release flags.
     # This is really as an assertion that cmake is behaving as we expect.
@@ -359,7 +344,7 @@ if(EMSCRIPTEN)
     add_nondebug_compile_flag("-flto")
   endif()
   if(EMSCRIPTEN_ENABLE_WASM64)
-    add_compile_flag("-sMEMORY64 -Wno-experimental")
+    add_compile_flag("-sMEMORY64")
     add_link_flag("-sMEMORY64")
   endif()
 endif()