Do not use unsupported SRI with webfont preload (#536)
* Revert "Use pipes to fingerprint forkawesome-webfont.woff2"
This reverts commit df57316f0756a917b856819653c3db510aa894e9.
* Revert "Verify forkawesome-webfont.woff2 integrity"
This reverts commit 5791f1b8099fbb8ecf349f01bcf80556d11f51d2.