wasm: do not use inline comment in .editorconfig (GH-106610)

It is no longer valid since 0.15.0
https://github.com/editorconfig/specification/blob/v0.15/index.rstGH-no-inline-comments
(cherry picked from commit 64c0890)

Co-authored-by: Eisuke Kawashima <e-kwsm@users.noreply.github.com>

Author: miss-islington

Tools/wasm/.editorconfig

@@ -1,4 +1,5 @@
-root = false  # This extends the root .editorconfig
+# This extends the root .editorconfig
+root = false
 
 [*.{html,js}]
 trim_trailing_whitespace = true