Rip out all the graphviz stuff

EditorEntryBase.js

@@ -4,8 +4,6 @@ class EditorEntryBase extends ListenUtils {
   constructor() {
     super();
 
-    this.id = randStr64();
-
     this.elem_ = document.createElement('li');
     this.elem_.tabIndex = 0;
     this.listen(this.elem_, 'focus', () => this.onElemFocus());

EditorGroup.js

@@ -27,25 +27,6 @@ class EditorGroup extends EditorEntryBase {
     };
   }
 
-  exportGraphviz() {
-    let lines = [
-        'subgraph "cluster_' + this.id + '" {',
-    ];
-
-    if (this.getLabel() != '') {
-      lines.push('\tlabel = "' + this.getLabel() + '";');
-    }
-
-    for (let obj of this.nodes) {
-      for (let line of obj.exportGraphviz()) {
-        lines.push('\t' + line);
-      }
-    }
-
-    lines.push('}');
-    return lines;
-  }
-
   getNodes() {
     return this.nodes_.getEntries(EditorNode);
   }

EditorLabel.js

@@ -24,10 +24,6 @@ class EditorLabel extends EditorEntryBase {
     };
   }
 
-  exportGraphviz() {
-    return [];
-  }
-
   getLabel() {
     return this.input_.value;
   }

EditorLink.js

@@ -29,26 +29,6 @@ class EditorLink extends EditorEntryBase {
     };
   }
 
-  exportGraphviz() {
-    if (this.getFrom().getLabel() == '' || this.getTo().getLabel() == '') {
-      return [];
-    }
-
-    let label = '';
-    if (this.getLabel() != '') {
-      label = ' [label="' + this.getLabel() + '"]';
-    }
-
-    let ret = [];
-    for (let from of this.from) {
-      for (let to of this.to) {
-        ret.push('"' + from.id + '" -> "' + to.id + '"' + label + ';');
-      }
-    }
-
-    return ret;
-  };
-
   getFrom() {
     return this.nodes_.getEntries(EditorNode)[0];
   }

EditorNode.js

@@ -23,13 +23,6 @@ class EditorNode extends EditorEntryBase {
     };
   }
 
-  exportGraphviz() {
-    if (this.getLabel() == '') {
-      return [];
-    }
-    return ['"' + this.id + '" [label="' + this.getLabel() + '"];'];
-  }
-
   getLabel() {
     return this.input_.value;
   }

utils.js

@@ -1,12 +1,3 @@
-function randStr32() {
-  let num = Math.floor(Math.random() * Math.pow(2, 32));
-  return num.toString(16).padStart(8, '0');
-}
-
-function randStr64() {
-  return randStr32() + randStr32();
-}
-
 function getOrSet(container, key, newValue) {
   let val = container.get(key);
   if (!val) {