[SalesForce] Is it possible to Remove fields using Change Sets deployment

Changeset deployment usually does not have SLA and what you have experienced is an expected behavior. Deployment time will always vary and how long one deployment takes to complete does not become a benchmark on how long it'll take to complete another

There are times when changeset deployment will hit a legitimate issue such as gack or a lock and when those occur, Salesforce support can definitely investigate and escalate to have the issue rectified. However in few cases the deployment doesn't hit any gack or lock.

If it took this long to complete may possibly be link to the the many post release patches Salesforce.com have been rolling out, as when a patch goes out active requests like changesets are temporary put on hold and resumed when ready, other possible causes of extended deployment time are size/types of component being deploy and how it affect/changes the org, heavy traffic on the instance or simply multiple deployment / validation holding up the total overall deployment process in the org.

However we need to remember there are no SLA with changeset, but if you want to deploy quicker and have more control over their deployment, then IDE / ANT is the way to go.

This is not an error , you need to wait. It sometimes takes time for change sets to appear in Production.