Remove unused argument to inflateInit()

There is just one argument to inflateInit(). It is inflateInit2() that
takes two arguments.

Since this argument was never used, let's just remove it and keep the
existing behaviour.

core/inflator.js

@@ -14,9 +14,8 @@ export default class Inflate {
         this.strm = new ZStream();
         this.chunkSize = 1024 * 10 * 10;
         this.strm.output = new Uint8Array(this.chunkSize);
-        this.windowBits = 5;
 
-        inflateInit(this.strm, this.windowBits);
+        inflateInit(this.strm);
     }
 
     setInput(data) {