How to remove Feature from site?

What you are seeing are references in your database after a solution/webpart that was not removed correctly.

I assume that you just uninstalled and removed the solution? If you know in which site och sub site the web part and feature was activated, you could add and install the solution again to your farm and follow those steps:

• Go to the site or sub sites where the web part is/was and remove it either by edit the page or when at the specific site add ?contents=1 to the end of the url. This will take you to the sites Web Part Page Maintenance. Example: http://serverName/sites/subsite/default.aspx?Contents=1

From here you can remove the web parts.

• Go to the top level site collection > site settings > web part gallery and remove the web part from the gallery. ( Bamboo.TreeView.dwp ) Remember to empty the recycle bin and the site collection admin recycle bin.

• After the 2 steps above have been completed, inactivate the feature, on all the sub sites where it was activated and the top-level site. Make sure that you have removed all the references before deactivating it. Use test-spcontentdatabase frequently to see that you are making progress and are getting rid of the web part references.

• When the database is clean and the feature is deactivated, you can finally uninstall and remove the solution again.

Do this after work hours, because deploying the solution and removing it will cause an IIS-reset to your farm.

Hope this helps.

There are couple of ways to remove it.

Using Powershell

First, using this Powershell script by Phil Childs:

To use the script, run these functions in a PowerShell console with the SharePoint 2010 add-ons loaded:

function Remove-SPFeatureFromContentDB($ContentDb, $FeatureId, [switch]$ReportOnly) { $db = Get-SPDatabase | where { $_.Name -eq $ContentDb } [bool]$report = $false if ($ReportOnly) { $report = $true } $db.Sites | ForEach-Object { Remove-SPFeature -obj $_ -objName "site collection" -featId $FeatureId -report $report $_ | Get-SPWeb -Limit all | ForEach-Object { Remove-SPFeature -obj $_ -objName "site" -featId $FeatureId -report $report } } } function Remove-SPFeature($obj, $objName, $featId, [bool]$report) { $feature = $obj.Features[$featId] if ($feature -ne $null) { if ($report) { write-host "Feature found in" $objName ":" $obj.Url -foregroundcolor Red } else { try { $obj.Features.Remove($feature.DefinitionId, $true) write-host "Feature successfully removed from" $objName ":" $obj.Url -foregroundcolor Red } catch { write-host "There has been an error trying to remove the feature:" $_ } } } else { write-host "Feature ID specified does not exist in" $objName ":" $obj.Url } } 

You now have two options for using these functions. If you just want to produce a report in the console showing which sites and site collections contain the feature, type the following (note the ReportOnly switch on the end):

Remove-SPFeatureFromContentDB -ContentDB "SharePoint_Content_Portal" -FeatureId "8096285f-1463-42c7-82b7-f745e5bacf29" –ReportOnly 

This command will step through all sites and site collections and display the following message whenever it finds the feature specified:

Feature found in site : http://portal/site

If you want to go ahead and remove the feature from all sites and site collections in the content database, type the same command without the ReportOnly switch on the end:

Remove-SPFeatureFromContentDB -ContentDB "SharePoint_Content_Portal" -FeatureId "8096285f-1463-42c7-82b7-f745e5bacf29" 

Running this command will step through all sites and site collections, remove the feature specified, and display the following output:

Feature successfully removed from site : http://portal/site

You should now be able to reanalyse the “Missing server side dependencies” issue in the Health Analyzer to clear the problem (providing there are no other issues reported under that title, of course!).

Using CodePlex Solution

There is also a CodePlex solution called SharePoint Feature Administration and Clean Up Tool