chore: remove mermaid

assets/styles/mermaid-cli.css

@@ -1,50 +0,0 @@
-svg {
-  font-family: "Helvetica Neue", Arial, PingFang SC, "Microsoft YaHei", sans-serif;
-  font-size: 13px;
-}
-
-svg .label {
-  color: #333;
-}
-svg .node rect,
-svg .node circle,
-svg .node ellipse,
-svg .node polygon {
-  fill: #eee;
-  stroke: #999;
-  stroke-width: 1px;
-}
-svg .node.clickable {
-  cursor: pointer;
-}
-svg .arrowheadPath {
-  fill: #333;
-}
-svg .edgePath .path {
-  stroke: #666;
-  stroke-width: 1.5px;
-}
-svg .edgeLabel {
-  background-color: #fff;
-}
-svg .cluster rect {
-  fill: #eaf2fb !important;
-  stroke: #26a !important;
-  stroke-width: 1px !important;
-}
-svg .cluster text {
-  fill: #333;
-}
-svg div.mermaidTooltip {
-  position: absolute;
-  text-align: center;
-  max-width: 200px;
-  padding: 2px;
-  font-family: "Helvetica Neue", Arial, PingFang SC, "Microsoft YaHei", sans-serif;
-  font-size: 12px;
-  background: #eaf2fb;
-  border: 1px solid #26a;
-  border-radius: 2px;
-  pointer-events: none;
-  z-index: 100;
-}

assets/styles/mermaid.css

@@ -1,50 +0,0 @@
-.mermaid {
-  font-family: "Helvetica Neue", Arial, PingFang SC, "Microsoft YaHei", sans-serif;
-  font-size: 13px;
-}
-
-.mermaid .label {
-  color: #333;
-}
-.mermaid .node rect,
-.mermaid .node circle,
-.mermaid .node ellipse,
-.mermaid .node polygon {
-  fill: #eee;
-  stroke: #999;
-  stroke-width: 1px;
-}
-.mermaid .node.clickable {
-  cursor: pointer;
-}
-.mermaid .arrowheadPath {
-  fill: #333;
-}
-.mermaid .edgePath .path {
-  stroke: #666;
-  stroke-width: 1.5px;
-}
-.mermaid .edgeLabel {
-  background-color: #fff;
-}
-.mermaid .cluster rect {
-  fill: #eaf2fb !important;
-  stroke: #26a !important;
-  stroke-width: 1px !important;
-}
-.mermaid .cluster text {
-  fill: #333;
-}
-.mermaid div.mermaidTooltip {
-  position: absolute;
-  text-align: center;
-  max-width: 200px;
-  padding: 2px;
-  font-family: "Helvetica Neue", Arial, PingFang SC, "Microsoft YaHei", sans-serif;
-  font-size: 12px;
-  background: #eaf2fb;
-  border: 1px solid #26a;
-  border-radius: 2px;
-  pointer-events: none;
-  z-index: 100;
-}

assets/styles/post.styl

@@ -1,5 +1,4 @@
 @import "~highlight.js/styles/atom-one-dark.css"
-@import "./mermaid.css"
 
 margin-y($top, $bottom = $top)
   margin-top $top