package.json: Remove unused dependencies imports-loader, lazysizes.

imports-loader is unused as of commit
218c60ae86 (#12749).

lazysizes is unused as of commit
8a15b9ee87 (#12112).

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>

package.json

@@ -31,12 +31,10 @@
     "handlebars-loader": "^1.7.1",
     "html-webpack-plugin": "^4.0.0-beta.8",
     "i18next": "^17.0.16",
-    "imports-loader": "^0.8.0",
     "jquery": "^3.4.1",
     "jquery-caret-plugin": "^1.5.2",
     "jquery-validation": "^1.19.0",
     "katex": "^0.10.2",
-    "lazysizes": "^5.1.0",
     "mini-css-extract-plugin": "^0.6.0",
     "moment": "^2.24.0",
     "moment-timezone": "^0.5.25",

yarn.lock

@@ -5801,14 +5801,6 @@ import-local@2.0.0, import-local@^2.0.0:
     pkg-dir "^3.0.0"
     resolve-cwd "^2.0.0"
 
-imports-loader@^0.8.0:
-  version "0.8.0"
-  resolved "https://registry.yarnpkg.com/imports-loader/-/imports-loader-0.8.0.tgz#030ea51b8ca05977c40a3abfd9b4088fe0be9a69"
-  integrity sha512-kXWL7Scp8KQ4552ZcdVTeaQCZSLW+e6nJfp3cwUMB673T7Hr98Xjx5JK+ql7ADlJUvj1JS5O01RLbKoutN5QDQ==
-  dependencies:
-    loader-utils "^1.0.2"
-    source-map "^0.6.1"
-
 imurmurhash@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/imurmurhash/-/imurmurhash-0.1.4.tgz#9218b9b2b928a238b13dc4fb6b6d576f231453ea"
@@ -6646,11 +6638,6 @@ lazy-cache@^1.0.3:
   resolved "https://registry.yarnpkg.com/lazy-cache/-/lazy-cache-1.0.4.tgz#a1d78fc3a50474cb80845d3b3b6e1da49a446e8e"
   integrity sha1-odePw6UEdMuAhF07O24dpJpEbo4=
 
-lazysizes@^5.1.0:
-  version "5.1.1"
-  resolved "https://registry.yarnpkg.com/lazysizes/-/lazysizes-5.1.1.tgz#7ca0266519d531ce740d6782e42faf700883646c"
-  integrity sha512-UCbdRSsozjlS6r56dPMFXX+AW2t8G0duRKxQDwvEpNTrWOHQo56YlTx5ssT7epU87PoruF1q9tvW3kSbQjorMw==
-
 lcid@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/lcid/-/lcid-2.0.0.tgz#6ef5d2df60e52f82eb228a4c373e8d1f397253cf"