remove unused

client/src/locales/en.json

@@ -526,20 +526,16 @@
 					"description": "Define the thresholds at which alerts should be triggered for this hardware monitor.",
 					"option": {
 						"cpuThreshold": {
-							"label": "CPU alert threshold (%)",
-							"placeholder": "80"
+							"label": "CPU alert threshold (%)"
 						},
 						"memoryThreshold": {
-							"label": "Memory alert threshold (%)",
-							"placeholder": "80"
+							"label": "Memory alert threshold (%)"
 						},
 						"diskThreshold": {
-							"label": "Disk alert threshold (%)",
-							"placeholder": "80"
+							"label": "Disk alert threshold (%)"
 						},
 						"tempThreshold": {
-							"label": "Temperature alert threshold (°C)",
-							"placeholder": "80"
+							"label": "Temperature alert threshold (°C)"
 						}
 					}
 				}