diff --git a/src/diagram-api/detectType.ts b/src/diagram-api/detectType.ts
index 34c78404a..87b681767 100644
--- a/src/diagram-api/detectType.ts
+++ b/src/diagram-api/detectType.ts
@@ -13,7 +13,7 @@ const diagramMatchers: Record<string, RegExp> = {
   gantt: /^\s*gantt/,
   classDiagram: /^\s*classDiagram-v2/,
   stateDiagram: /^\s*stateDiagram-v2/,
-  'flowchart-v2': /^\s*flowchart/,
+  'flowchart-v2': /^\s*flowchart/, // Might need to add |graph to fix #3391
   info: /^\s*info/,
   pie: /^\s*pie/,
   er: /^\s*erDiagram/,
@@ -72,8 +72,9 @@ export const detectType = function (text: string, config?: MermaidConfig): strin
       return key;
     }
   }
-
-  throw new Error(`No diagram type detected for text: ${text}`);
+  // TODO: #3391
+  // throw new Error(`No diagram type detected for text: ${text}`);
+  return 'flowchart';
 };
 
 export const addDetector = (key: string, detector: DiagramDetector) => {
diff --git a/src/styles.ts b/src/styles.ts
index 1b4105b99..29ebb4fe4 100644
--- a/src/styles.ts
+++ b/src/styles.ts
@@ -33,12 +33,6 @@ const themes = {
   c4,
 };
 
-// TODO: Delete as it's not used
-// export const calcThemeVariables = (theme: string, userOverRides) => {
-//   log.info('userOverides', userOverRides);
-//   return theme.calcColors(userOverRides);
-// };
-
 const getStyles = (
   type: string,
   userStyles: string,