Delete Sources/MathTexParser directory

Sources/MathTexParser/MathTexParser.swift

@@ -1,20 +0,0 @@
-//
-//  MathTexParser.swift
-//
-//
-//  Created by Peter Tang on 22/9/2023.
-//
-
-import Foundation
-import Antlr4
-import TexParser
-
-internal class MathTexParser {
-    func parse(input: String) {
-        let iStream = ANTLRInputStream(input)
-        let lexer = TeXLexer(iStream)
-        let tokenStream = CommonTokenStream(lexer)
-        if let parser = try? TeXParser(tokenStream), let _ = try? parser.prog() {
-        }
-    }
-}