remove unused diff dep

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

.changeset/flat-eels-exist.md

@@ -0,0 +1,5 @@
+---
+'@backstage/cli': patch
+---
+
+Remove unknown dependency `diff`

packages/cli/package.json

@@ -90,7 +90,6 @@
     "cross-spawn": "^7.0.3",
     "css-loader": "^6.5.1",
     "ctrlc-windows": "^2.1.0",
-    "diff": "^5.0.0",
     "esbuild": "^0.23.0",
     "esbuild-loader": "^4.0.0",
     "eslint": "^8.6.0",
@@ -169,7 +168,6 @@
     "@backstage/test-utils": "workspace:^",
     "@backstage/theme": "workspace:^",
     "@types/cross-spawn": "^6.0.2",
-    "@types/diff": "^5.0.0",
     "@types/ejs": "^3.1.3",
     "@types/express": "^4.17.6",
     "@types/fs-extra": "^11.0.0",

yarn.lock

@@ -3927,7 +3927,6 @@ __metadata:
     "@swc/helpers": ^0.5.0
     "@swc/jest": ^0.2.22
     "@types/cross-spawn": ^6.0.2
-    "@types/diff": ^5.0.0
     "@types/ejs": ^3.1.3
     "@types/express": ^4.17.6
     "@types/fs-extra": ^11.0.0
@@ -3959,7 +3958,6 @@ __metadata:
     css-loader: ^6.5.1
     ctrlc-windows: ^2.1.0
     del: ^7.0.0
-    diff: ^5.0.0
     esbuild: ^0.23.0
     esbuild-loader: ^4.0.0
     eslint: ^8.6.0
@@ -17355,13 +17353,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/diff@npm:^5.0.0":
-  version: 5.2.2
-  resolution: "@types/diff@npm:5.2.2"
-  checksum: f64504a8528fa2b1d6a966363e304ef0626d2e5e71bdcf4666a02b586f045cf7e47151cb80be00dbc310f19fa81fb45d3c37a0647441abd6942a54883dc4c6dc
-  languageName: node
-  linkType: hard
-
 "@types/docker-modem@npm:*":
   version: 3.0.2
   resolution: "@types/docker-modem@npm:3.0.2"