Bug 1607724 - Remove 3 licenses that we don't use anymore r=peterv

They were used by pdfium

Differential Revision: https://phabricator.services.mozilla.com/D59622

--HG--
extra : moz-landing-system : lando

toolkit/content/license.html

@@ -66,7 +66,6 @@
       <li><a href="about:license#adobecmap">Adobe CMap License</a></li>
       <li><a href="about:license#android">Android Open Source License</a></li>
       <li><a href="about:license#angle">ANGLE License</a></li>
-      <li><a href="about:license#agg">Anti-Grain Geometry Public License</a></li>
       <li><a href="about:license#apache">Apache License 2.0</a></li>
       <li><a href="about:license#apache-llvm">Apache License 2.0 with LLVM exception</a></li>
       <li><a href="about:license#apple">Apple License</a></li>
@@ -109,7 +108,6 @@
       <li><a href="about:license#icu">ICU License</a></li>
       <li><a href="about:license#immutable">Immutable.js License</a></li>
       <li><a href="about:license#jpnic">Japan Network Information Center License</a></li>
-      <li><a href="about:license#jsmn">JSMN License</a></li>
       <li><a href="about:license#jszip">JSZip License</a></li>
       <li><a href="about:license#jemalloc">jemalloc License</a></li>
       <li><a href="about:license#jquery">jQuery License</a></li>
@@ -118,7 +116,6 @@
       <li><a href="about:license#khronos">Khronos group License</a></li>
       <li><a href="about:license#kiss_fft">Kiss FFT License</a></li>
       <li><a href="about:license#lazy_static">lazy_static License</a></li>
-      <li><a href="about:license#lcms">lcms License</a></li>
 #ifdef MOZ_USE_LIBCXX
       <li><a href="about:license#libc++">libc++ License</a></li>
 #endif