diff --git a/examples/images/large.jp2 b/examples/images/large.jp2
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diff --git a/examples/images/large.jxr b/examples/images/large.jxr
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diff --git a/extensions/ie8-mq-shim.js b/extensions/ie8-mq-shim.js
deleted file mode 100644
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diff --git a/perf-test/index.html b/perf-test/index.html
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diff --git a/src/includes/apng.js b/src/includes/apng.js
deleted file mode 100644
index 49df4ba3..00000000
--- a/src/includes/apng.js
+++ /dev/null
@@ -1,17 +0,0 @@
-(function( w, doc ) {
- var pf = w.picturefill;
-
- pf._.types[ "image/x-apng" ] = w.picturefill._.types["image/x-apng"] = function() {
- var apngTest = new Image(), ctx = doc.createElement("canvas").getContext("2d");
- apngTest.onload = function() {
- console.log("hmmm");
- ctx.drawImage(apngTest, 0, 0);
- pf._.types["image/x-apng"] = ctx.getImageData(0, 0, 1, 1).data[3] === 0;
- w.picturefill();
- };
- apngTest.src = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAACGFjVEwAAAABAAAAAcMq2TYAAAANSURBVAiZY2BgYPgPAAEEAQB9ssjfAAAAGmZjVEwAAAAAAAAAAQAAAAEAAAAAAAAAAAD6A+gBAbNU+2sAAAARZmRBVAAAAAEImWNgYGBgAAAABQAB6MzFdgAAAABJRU5ErkJggg==";
- // frame 1 (skipped on apng-supporting browsers): [0, 0, 0, 255]
- // frame 2: [0, 0, 0, 0];
- return "pending";
- };
-} )( window, window.document );
diff --git a/src/includes/jp2.js b/src/includes/jp2.js
deleted file mode 100644
index 1ca1d316..00000000
--- a/src/includes/jp2.js
+++ /dev/null
@@ -1,4 +0,0 @@
-(function( w ) {
- var pf = w.picturefill;
- pf._.types[ "image/jp2" ] = pf._.detectTypeSupport("image/jp2","data:image/jp2;base64,/0//UQAyAAAAAAABAAAAAgAAAAAAAAAAAAAABAAAAAQAAAAAAAAAAAAEBwEBBwEBBwEBBwEB/1IADAAAAAEAAAQEAAH/XAAEQED/ZAAlAAFDcmVhdGVkIGJ5IE9wZW5KUEVHIHZlcnNpb24gMi4wLjD/kAAKAAAAAABYAAH/UwAJAQAABAQAAf9dAAUBQED/UwAJAgAABAQAAf9dAAUCQED/UwAJAwAABAQAAf9dAAUDQED/k8+kEAGvz6QQAa/PpBABr994EAk//9k=");
-} )( window );
diff --git a/src/includes/jxr.js b/src/includes/jxr.js
deleted file mode 100644
index 8f35937a..00000000
--- a/src/includes/jxr.js
+++ /dev/null
@@ -1,4 +0,0 @@
-(function( w ) {
- var pf = w.picturefill;
- pf._.types[ "image/vnd.ms-photo" ] = pf._.detectTypeSupport("image/vnd.ms-photo","data:image/vnd.ms-photo;base64,SUm8AQgAAAAFAAG8AQAQAAAASgAAAIC8BAABAAAAAQAAAIG8BAABAAAAAQAAAMC8BAABAAAAWgAAAMG8BAABAAAAHwAAAAAAAAAkw91vA07+S7GFPXd2jckNV01QSE9UTwAZAYBxAAAAABP/gAAEb/8AAQAAAQAAAA==");
-} )( window );