Update .editorconfig

Signed-off-by: Sora Morimoto <sora@morimoto.io>

Author: smorimoto

.editorconfig

@@ -1,30 +1,9 @@
-# This file is for unifying the coding style for different editors and IDEs
-# editorconfig.org
-
 root = true
 
 [*]
-end_of_line = lf
 charset = utf-8
-trim_trailing_whitespace = true
-insert_final_newline = true
-
-[**.js]
-indent_style = space
-indent_size = 2
-
-[**.{css,scss}]
-indent_style = space
-indent_size = 2
-
-[**.rb]
-indent_style = space
+end_of_line = lf
 indent_size = 2
-
-[**.html]
 indent_style = space
-indent_size = 2
-
-[{Makefile,**.mk}]
-# Use tabs for indentation (Makefiles require tabs)
-indent_style = tab
+insert_final_newline = true
+trim_trailing_whitespace = true