diff --git a/src/roundRect.ts b/src/roundRect.ts
deleted file mode 100644
index bba0e6dec..000000000
--- a/src/roundRect.ts
+++ /dev/null
@@ -1,37 +0,0 @@
-/**
- * https://stackoverflow.com/a/3368118
- * Draws a rounded rectangle using the current state of the canvas.
- * @param {CanvasRenderingContext2D} context
- * @param {Number} x The top left x coordinate
- * @param {Number} y The top left y coordinate
- * @param {Number} width The width of the rectangle
- * @param {Number} height The height of the rectangle
- * @param {Number} radius The corner radius
- */
-export function roundRect(
-  context: CanvasRenderingContext2D,
-  x: number,
-  y: number,
-  width: number,
-  height: number,
-  radius: number
-) {
-  context.beginPath();
-  context.moveTo(x + radius, y);
-  context.lineTo(x + width - radius, y);
-  context.quadraticCurveTo(x + width, y, x + width, y + radius);
-  context.lineTo(x + width, y + height - radius);
-  context.quadraticCurveTo(
-    x + width,
-    y + height,
-    x + width - radius,
-    y + height
-  );
-  context.lineTo(x + radius, y + height);
-  context.quadraticCurveTo(x, y + height, x, y + height - radius);
-  context.lineTo(x, y + radius);
-  context.quadraticCurveTo(x, y, x + radius, y);
-  context.closePath();
-  context.fill();
-  context.stroke();
-}