remove duplicated string

Author: francescospissu

arduino-ide-extension/src/browser/arduino-frontend-contribution.tsx

@@ -134,7 +134,10 @@ export class ArduinoFrontendContribution
     registry.registerItem({
       id: 'toggle-serial-plotter',
       command: SerialPlotterContribution.Commands.OPEN_TOOLBAR.id,
-      tooltip: nls.localize('arduino/common/serialPlotter', 'Serial Plotter'),
+      tooltip: nls.localize(
+        'arduino/serial/openSerialPlotter',
+        'Serial Plotter'
+      ),
     });
     registry.registerItem({
       id: 'toggle-serial-monitor',

i18n/en.json

@@ -109,7 +109,6 @@
       "selectBoard": "Select Board",
       "selectedOn": "on {0}",
       "serialMonitor": "Serial Monitor",
-      "serialPlotter": "Serial Plotter",
       "unknown": "Unknown"
     },
     "compile": {