diff --git a/resources/shaders/blur.fs.glsl b/resources/shaders/blur.fs.glsl
deleted file mode 100644
index 2af2a7ebabb..00000000000
--- a/resources/shaders/blur.fs.glsl
+++ /dev/null
@@ -1,44 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-// `vBorderPosition` is the position of the source texture in the atlas.
-
-float gauss(float x, float sigma) {
-    return (1.0 / sqrt(6.283185307179586 * sigma * sigma)) * exp(-(x * x) / (2.0 * sigma * sigma));
-}
-
-void main(void) {
-#ifdef SERVO_ES2
-    // TODO(gw): for loops have to be unrollable on es2.
-    SetFragColor(vec4(1.0, 0.0, 0.0, 1.0));
-#else
-    vec2 sideOffsets = (vDestTextureSize - vSourceTextureSize) / 2.0;
-    int range = int(vBlurRadius) * 3;
-    float sigma = vBlurRadius / 2.0;
-    vec4 value = vec4(0.0);
-    vec2 sourceTextureUvOrigin = vBorderPosition.xy;
-    vec2 sourceTextureUvSize = vBorderPosition.zw - sourceTextureUvOrigin;
-    for (int offset = -range; offset <= range; offset++) {
-        float offsetF = float(offset);
-        vec2 lColorTexCoord = (vColorTexCoord.xy * vDestTextureSize - sideOffsets) /
-            vSourceTextureSize;
-        lColorTexCoord += vec2(offsetF) / vSourceTextureSize * uDirection;
-        vec4 x = lColorTexCoord.x >= 0.0 &&
-            lColorTexCoord.x <= 1.0 &&
-            lColorTexCoord.y >= 0.0 &&
-            lColorTexCoord.y <= 1.0 ?
-            texture(sDiffuse, lColorTexCoord * sourceTextureUvSize + sourceTextureUvOrigin) :
-            vec4(0.0);
-
-        // Alpha must be premultiplied in order to properly blur the alpha channel.
-        value += vec4(x.rgb * x.a, x.a) * gauss(offsetF, sigma);
-    }
-
-    // Unpremultiply the alpha.
-    value = vec4(value.rgb / value.a, value.a);
-
-    SetFragColor(value);
-#endif
-}
-
diff --git a/resources/shaders/blur.vs.glsl b/resources/shaders/blur.vs.glsl
deleted file mode 100644
index 4e03cf38a67..00000000000
--- a/resources/shaders/blur.vs.glsl
+++ /dev/null
@@ -1,14 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-void main(void)
-{
-    vColorTexCoord = aColorTexCoordRectTop.xy;
-    vBorderPosition = aBorderPosition;
-    vBlurRadius = aBlurRadius;
-    vDestTextureSize = aDestTextureSize;
-    vSourceTextureSize = aSourceTextureSize;
-    gl_Position = uTransform * vec4(aPosition, 1.0);
-}
-