Housekeeping: remove redundant git add in lint-staged config (#3800)

Author: RasmusKjeldgaard

.lintstagedrc

@@ -1,14 +1,11 @@
 {
 	"*.{ts,json,md,scss,html}": [
-		"prettier --write",
-		"git add"
+		"prettier --write"
 	],
 	"*.ts": [
-		"eslint --fix",
-		"git add"
+		"eslint --fix"
 	],
 	"*.scss": [
-		"stylelint --fix",
-		"git add"
+		"stylelint --fix"
 	]
 }