Remove strict since it's default in deno

lib/bitmapper.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let interlaceUtils = require("./interlace");
 
 let pixelBppMapper = [

lib/bitpacker.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let constants = require("./constants");
 
 module.exports = function (dataIn, width, height, options) {

lib/chunkstream.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let util = require("util");
 let Stream = require("stream");
 

lib/constants.js

@@ -1,5 +1,3 @@
-"use strict";
-
 module.exports = {
   PNG_SIGNATURE: [0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a],
 

lib/crc.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let crcTable = [];
 
 (function () {

lib/filter-pack.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let paethPredictor = require("./paeth-predictor");
 
 function filterNone(pxData, pxPos, byteWidth, rawData, rawPos) {

lib/filter-parse-async.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let util = require("util");
 let ChunkStream = require("./chunkstream");
 let Filter = require("./filter-parse");

lib/filter-parse-sync.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let SyncReader = require("./sync-reader");
 let Filter = require("./filter-parse");
 

lib/filter-parse.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let interlaceUtils = require("./interlace");
 let paethPredictor = require("./paeth-predictor");
 

lib/format-normaliser.js

@@ -1,5 +1,3 @@
-"use strict";
-
 function dePalette(indata, outdata, width, height, palette) {
   let pxPos = 0;
   // use values from palette

lib/interlace.js

@@ -1,5 +1,3 @@
-"use strict";
-
 // Adam 7
 //   0 1 2 3 4 5 6 7
 // 0 x 6 4 6 x 6 4 6

lib/packer-async.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let util = require("util");
 let Stream = require("stream");
 let constants = require("./constants");

lib/packer-sync.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let hasSyncZlib = true;
 let zlib = require("zlib");
 if (!zlib.deflateSync) {

lib/packer.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let constants = require("./constants");
 let CrcStream = require("./crc");
 let bitPacker = require("./bitpacker");

lib/paeth-predictor.js

@@ -1,5 +1,3 @@
-"use strict";
-
 module.exports = function paethPredictor(left, above, upLeft) {
   let paeth = left + above - upLeft;
   let pLeft = Math.abs(paeth - left);

lib/parser-async.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let util = require("util");
 let zlib = require("zlib");
 let ChunkStream = require("./chunkstream");

lib/parser-sync.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let hasSyncZlib = true;
 let zlib = require("zlib");
 let inflateSync = require("./sync-inflate");

lib/png-sync.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let parse = require("./parser-sync");
 let pack = require("./packer-sync");
 

lib/png.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let util = require("util");
 let Stream = require("stream");
 let Parser = require("./parser-async");

lib/sync-inflate.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let assert = require("assert").ok;
 let zlib = require("zlib");
 let util = require("util");

lib/sync-reader.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let SyncReader = (module.exports = function (buffer) {
   this._buffer = buffer;
   this._reads = [];