Revert "Fix startup freeze on weak devices and add Vercel Analytics"

This reverts commit b1de6a8e56.

js/engine.js

@@ -5,7 +5,6 @@ var Engine = (function () {
   var canvas, gl, program, uniforms = {};
   var playing = true;
   var suspended = false;
-  var started = false;
   var loopT = 0;            // seconds into current loop
   var lastTick = 0;
   var fps = 60, fpsAcc = 0, fpsN = 0, fpsCb = null;
@@ -33,14 +32,13 @@ var Engine = (function () {
     return sh;
   }
 
-  function init(canvasEl, paramsGetter, opts) {
-    opts = opts || {};
+  function init(canvasEl, paramsGetter) {
     canvas = canvasEl;
     getParams = paramsGetter;
     gl = canvas.getContext("webgl2", {
       antialias: false,
       preserveDrawingBuffer: true,
-      powerPreference: "default"
+      powerPreference: "high-performance"
     });
     if (!gl) throw new Error("WebGL2 not available");
 
@@ -63,15 +61,6 @@ var Engine = (function () {
       uniforms[n] = gl.getUniformLocation(program, n);
     });
 
-    lastTick = performance.now();
-    started = false;
-    if (opts.autostart) start();
-  }
-
-  function start() {
-    if (started) return;
-    started = true;
-    suspended = false;
     lastTick = performance.now();
     requestAnimationFrame(tick);
   }
@@ -179,7 +168,6 @@ var Engine = (function () {
 
   return {
     init: init,
-    start: start,
     setSize: setSize,
     renderAt: renderAt,
     readPixels: readPixels,