"drop support" is correct and usable in written English.
It means to withdraw or end support for something or someone. Example sentence: The government decided to drop support for the embattled politician.
Eleven of 12 subjects required foot drop support with orthotics.
Online activists have targeted Jones and others, forcing some advertisers to drop support of the programs.
Its opposition to the HS2 high-speed rail line threatens Tory seats and may persuade Cameron to drop support for it.
Beardsley points out that many other software companies drop support for older software, and the affected versions are two back from Lollipop, the current release.
Mr. Prosper was one of several government officials who fanned out today to explain the administration's decision to drop support for a treaty that democratic nations have ratified.
Her friends have insisted that she was leaned on by Labour's London HQ to drop support for the devolution of income tax resulting in an incoherent plan.
This rapid initial increase in pressure drop supports the possible reformation of foam lamella as water is injected into the core.
Upgraded support to Lua 5.2 (dropped support for 5.1).
Dropping support for plug-ins would involve dropping support for Microsoft's Silverlight, which further illustrates the cluelessness of the "Microsoft drops Flash" brigade.
The iPhone, which has never supported Flash video, has been the catalyst for an increasing number of sites dropping support.
The suggestion that Republicans dropped support for the mandate only after President Obama proposed it is categorically false.
