diff --git a/.directory b/.directory
deleted file mode 100644
index 7867747..0000000
--- a/.directory
+++ /dev/null
@@ -1,4 +0,0 @@
-[Dolphin]
-PreviewsShown=true
-Timestamp=2013,12,4,22,41,12
-Version=3
diff --git a/lib/parseArgs.js b/lib/parseArgs.js
index 3b49f56..1e5166b 100644
--- a/lib/parseArgs.js
+++ b/lib/parseArgs.js
@@ -1,4 +1,4 @@
-module.exports = function parseArgs(data,options) {
+module.exports = function parseArgs(data, options) {
   // if we are rendering a post,
   // `data` has the key `path`
   // https://github.com/hexojs/hexo/blob/2ed17cd105768df379dad8bbbe4df30964fe8f2d/lib/hexo/post.js#L269
@@ -9,7 +9,7 @@ module.exports = function parseArgs(data,options) {
   let standalone = "path" in data;
 
   let config = this.config?.pandoc;
-  var args = ['-M', 'pagetitle=dummy'];
+  var args = ["-M", "pagetitle=dummy"];
 
   /* istanbul ignore else*/
   // ignore testing the old interface
@@ -19,85 +19,25 @@ module.exports = function parseArgs(data,options) {
     // if rendering embedded content
     if (!standalone) {
       // remove template, which only apply to standalong posts
-      let templateIdx = args.findIndex(item => item.startsWith("--template="));
+      let templateIdx = args.findIndex((item) =>
+        item.startsWith("--template=")
+      );
       if (templateIdx > -1) {
-        args.splice(templateIdx, 1)
+        args.splice(templateIdx, 1);
       }
     }
-
   } else {
-    // old yaml dictionary interface for argument specification
-    // deprecating due to #54
-    // i.e., will keep the code for backward compatibility
-    // but will not provide support in the future
-
-    var extensions = '', filters = [], extra = [];
-    // To satisfy pandoc's requirement that html5 must have a title.
-    // Since the markdown file is only rendered as body part,
-    // the title is never used and thus does not matter
-    var meta = [];
-    var math = '--mathjax';
-
-    if(config) {
-      if(config.extensions) {
-        config.extensions.forEach(function(extension) {
-          extensions += extension;
-        });
-      }
-
-      if(config.filters) {
-        config.filters.forEach(function(filter) {
-          filters.push('--filter');
-          filters.push(filter);
-        });
-      }
-
-      if(config.extra) {
-        for(var e in config.extra) {
-          var eoption = config.extra[e];
-          for (var key in eoption){
-            extra.push('--' + key);
-            if(eoption[key]!=null) {
-              extra.push(eoption[key]);
-            }
-          }
-        }
-      }
-
-      if(config.meta) {
-        config.meta.forEach(function(m) {
-          meta.push('-M');
-          if(m.length) {
-            meta.push(m);
-          } else {
-            for(var m2 in m) {
-              meta.push(m2 + '=' + m[m2]);
-            }
-          }
-        });
-      }
-
-      if(config.mathEngine) {
-        if(typeof config.mathEngine === 'string') {
-          math = '--' + config.mathEngine;
-        }
-      }
-    }
-
-    args = args
-      .concat([ '-f', 'markdown-smart'+extensions, '-t', 'html-smart', math])
-      .concat(filters)
-      .concat(extra)
-      .concat(meta);
-
-    // only apply template when rendering post, not tags
-    if (standalone && config && config.template) {
-      args.push("--template=" + config.template);
-    }
+    args = args.concat([
+      "-f",
+      "markdown-smart",
+      "-t",
+      "html-smart",
+      "--mathjax",
+    ]);
   }
 
   // are we rendering a standalone post?
-  if(standalone) {
+  if (standalone) {
     // do not apply `--standalone`,
     // header/footer are to be added by Hexo
 
@@ -112,4 +52,4 @@ module.exports = function parseArgs(data,options) {
   }
 
   return args;
-}
\ No newline at end of file
+};
diff --git a/old.md b/old.md
deleted file mode 100644
index d3dc818..0000000
--- a/old.md
+++ /dev/null
@@ -1,82 +0,0 @@
-You can pass additional arguments to pandoc through `_config.yml`. The default configuration is:
-
-```yml
-pandoc:
-  filters:
-  extra:
-  template:
-  meta:
-  mathEngine:
-```
-
-* `filters` is a list of any pandoc filter installed on your path.
-* `extra` is a list of mappings:
-
-```yml
-extra:
-  - key: value
-```
-passed to pandoc as `--key value`.
-
-* `template` is a template file you wish to use when pandoc generates your posts:
-
-``` yml
-template: dir/.../template.html
-```
-
-will be passed to pandoc as `--template=dir/../template.html`
-
-The path of the template should be relative to the root of your blog.
-
-For example, the very simple template
-
-``` html
-$if(toc)$
-<div id="$idprefix$TOC">
-$toc$
-</div>
-$endif$
-$body$
-```
-
-prepends table of contents to all your posts if variable `--toc` is also passed. To enable TOC, add to your `_config.yml`:
-
-``` yml
-pandoc:
-  # other options
-  extra:
-    - toc: # will be passed as `--toc`. Note the colon
-  template: dir/../template.html
-```
-
-* `meta` is a list of anything you wish to be sent to pandoc as meta:
-
-```yml
-meta:
-  - key: value1
-  - value2
-```
-would be passed as `-M key=value1 -M value2`.
-
-`pandoc-citeproc` for example can be configured as:
-
-```yml
-pandoc:
-  filters:
-    - pandoc-citeproc
-  extra:
-    - bibliography: "/path/to/bibfile.bib"
-  meta:
-    - suppress-bibliography
-```
-
-* `mathEngine` is an option for choosing math engine. By default, mathEngine is mathjax.
-
-For example, if you want to use KaTeX, you can pass `katex` to the mathEngine option:
-
-```
-pandoc:
-  mathEngine: katex
-```
-
-Then, the args of pandoc is this: `[..., "--katex", ...]` .
\ No newline at end of file