Docs: Remove duplicate Panel overview topic. (#29248)

* Remove duplicate Panel overview topic. Add aliases metadata to _index.md file.

* Fixed a broken relref.

docs/sources/getting-started/getting-started.md

@@ -41,7 +41,7 @@ To create your first dashboard:
 
  Continue to experiment with what you have built, try the [explore workflow]({{< relref "../explore/index.md" >}}) or another visualization feature. Refer to [Data sources]({{< relref "../datasources" >}}) for a list of supported data sources and instructions on how to [add a data source]({{< relref "../datasources/add-a-data-source.md" >}}). The following topics will be of interest to you:
 
-- [Panels]({{< relref "../panels/panels-overview.md" >}})
+- [Panels]({{< relref "../panels/_index.md" >}})
 - [Dashboards]({{< relref "../dashboards/_index.md" >}})
 - [Keyboard shortcuts]({{< relref "../dashboards/shortcuts.md" >}})
 - [Plugins](https://grafana.com/grafana/plugins?orderBy=weight&direction=asc)

docs/sources/panels/_index.md

 +++
 title = "Panels"
+aliases = ["/docs/grafana/latest/features/panels/panels/"]
 weight = 70
 +++
 

docs/sources/panels/panels-overview.md

-+++
-title = "Panels"
-aliases = ["/docs/grafana/latest/features/panels/panels/"]
-weight = 4
-+++
-
-# Panel overview
-
-The *panel* is the basic visualization building block in Grafana. Each panel has a query editor specific to the data source selected in the panel. The query editor allows you to extract the perfect visualization to display on the panel.
-
-With the exception of a few special use panels, a panel is a visual representation of one or more queries. The queries display data over time. This can range from temperature fluctuations to current server status to a list of logs or alerts.
-
-In order to display data, you need to have at least one data source added to Grafana. Refer to [Add a data source]({{< relref "../datasources/add-a-data-source.md" >}}) for instructions, or see our [Getting started]({{< relref "../getting-started/getting-started.md" >}}) guide if you want to make your first dashboard and panel using our TestData DB data source.
-
-There are a wide variety of styling and formatting options for each panel. Panels can be dragged and dropped and rearranged on the dashboard. They can also be resized.
-
-## Move or resize panels
-
-You can drag and drop panels by clicking and holding the panel title, then dragging it to its new location. You can also easily resize panels by clicking the (-) and (+) icons.
-
-![](/img/docs/animated_gifs/drag_drop.gif)
-
-## Tips and shortcuts
-
-- Click the graph title and in the dropdown menu quickly duplicate the panel.
-- Click the colored icon in the legend to change a series color or the y-axis.
-- Click series name in the legend to hide series.
-- Ctrl/Shift/Meta + click legend name to hide other series.
-- Hover your cursor over a panel and press `e` to open the panel editor.
-- Hover your cursor over a panel and press `v` to open the panel in fullscreen view.
\ No newline at end of file