Remove unnecessary saveOptions call

This call did trigger an endless loop which called `devTool.saveOptions` as many times as we could, till the `MAX_WRITE_OPERATIONS_PER_MINUTE` error stopped us.
Because, when we alter the checkbox with `detailPanelShow.checked = false` the eventlistener on the checkbox will save the new state and call our function - no need to alter the devTool options again

src/popup.js

@@ -53,7 +53,6 @@ const maybeHideDetailPanel = () => {
 
   if (!showDetailPanel) {
     detailPanelShow.checked = false
-    devTool.saveOptions({ detailPanel: { ...devTool.options.detailPanel, show: false } })
     toggleDetailPanelInputs(false)
   }
 }