Remove full-icu

full-icu is the default as of Node v13. I tested
`Number.prototype.toLocaleString` against the
nodejs_16.1.0-deb-1nodesource1_amd64.deb package to verify that
localization works out of the box.

Reverts the following commits:

96e4a95
2c9f9d2

Author: mwiencek

docker/scripts/start_template_renderer.sh

@@ -7,4 +7,4 @@ MBS_ROOT=$MBS_HOME/musicbrainz-server
 
 cd "$MBS_ROOT"
 
-exec sudo -E -H -u musicbrainz node --icu-data-dir=node_modules/full-icu root/server.js
+exec sudo -E -H -u musicbrainz node root/server.js

package.json

@@ -34,7 +34,6 @@
     "detect-node": "2.0.3",
     "file-loader": "3.0.1",
     "filesize": "2.0.4",
-    "full-icu": "1.3.1",
     "generic-diff": "1.0.1",
     "he": "1.1.1",
     "imports-loader": "0.8.0",

script/start_renderer.pl

@@ -43,6 +43,5 @@
     push @argv, ('--socket', $socket) if $socket;
     push @argv, ('--workers', $workers) if $workers;
     chdir qq($FindBin::Bin/../);
-    # If updating to a min. req. of Node 13+, check if icu-data-dir is still needed
-    exec 'node', '--icu-data-dir=node_modules/full-icu', 'root/server.js', @argv;
+    exec 'node', 'root/server.js', @argv;
 }

yarn.lock

@@ -3380,11 +3380,6 @@ fsevents@^1.2.7:
     bindings "^1.5.0"
     nan "^2.12.1"
 
-[email protected]:
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/full-icu/-/full-icu-1.3.1.tgz#e67fdf58523f1d1e0d9143b1542fe2024c1c8997"
-  integrity sha512-VMtK//85QJomhk3cXOCksNwOYaw1KWnYTS37GYGgyf7A3ajdBoPGhaJuJWAH2S2kq8GZeXkdKn+3Mfmgy11cVw==
-
 function-bind@^1.0.2, function-bind@^1.1.1, function-bind@~1.1.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.1.tgz#a56899d3ea3c9bab874bb9773b7c5ede92f4895d"