Revert ".editorconfig: fixed utf8 issue"

This reverts commit d20a1da6f8.

.editorconfig

@@ -1,7 +1,7 @@
 root = true
 
 [*]
-charset = utf-8
+charset = utf8
 end_of_line = lf
 indent_style = tab
 indent_size = 4

src/fop.rs

@@ -1,76 +0,0 @@
-/*
- * Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
- * SPDX-License-Identifier: AGPL-3.0-or-later
- *
- * This program is free software: you can redistribute it and/or modify it under
- * the terms of the GNU Affero General Public License as published by the Free
- * Software Foundation, either version 3 of the License, or (at your option) any
- * later version.
- * 
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see https://www.gnu.org/licenses/.
- */
-
-use std::{
-	env::args,
-	io::{ Read, stdin, Write },
-	process::{ Command, exit, Stdio },
-};
-
-fn main() {
-	let argv = args().collect::<Vec<String>>();
-
-	let index = match argv.get(1) {
-		Some(i) => {
-			i.parse::<usize>().unwrap_or_else(|_| {
-				eprintln!("{}: {}: Not an integer.", argv[0], i);
-				exit(1);
-			})
-		},
-		None => {
-			eprintln!("Usage: {} index command args...", argv[0]);
-			exit(1);
-		},
-	};
-
-	let mut buf = String::new();
-	stdin().read_to_string(&mut buf).unwrap();
-	let mut fields = buf.split('␞').collect::<Vec<&str>>();
-
-	argv.get(2).unwrap_or_else(|| {
-		eprintln!("Usage: {} index command args...", argv[0]);
-		exit(1);
-	});
-
-	let opts = argv.iter().clone().skip(3).collect::<Vec<&String>>();
-
-	let mut spawned = Command::new(argv.get(2).unwrap())
-		.args(opts)
-		.stdin(Stdio::piped())
-		.stdout(Stdio::piped())
-		.spawn()
-		.unwrap();
-
-	let field = fields.get(index).unwrap_or_else(|| {
-		eprintln!("{}: {}: No such index in input.", argv[0], index.to_string());
-		exit(1);
-	});
-
-	if let Some(mut child_stdin) = spawned.stdin.take() {
-		child_stdin.write_all(field.as_bytes()).unwrap();
-		drop(child_stdin);
-	}
-
-	let output = spawned.wait_with_output().unwrap();
-
-	let new_field = String::from_utf8(output.stdout).unwrap();
-
-	fields[index] = &new_field;
-
-	print!("{}", fields.join("␞"));
-}