Remove duplicate setting of uint16 bit size

Fixes #12126.  The correct bit depth for uint16 is 16; for some reason,
the bit depth was being set twice for uint16 (first to 16, then to 32).
merge develop -D org: PR 2127 (Working view to email announcements to selected users, groups, email addresses and/or all users)
merge develop -D org: PR 2160 (Warning dialog before deletion of linked images)
merge develop -D org: PR 2165 (Inplace file path)
merge develop -D org: PR 2182 (Read only flag)
merge develop -D org: PR 2188 (Close the RFS and kill the root session.)
merge develop -D org: PR 2204 (Workaround for Java 7 bug)
merge develop -D org: PR 2207 (Implemented maximum file size limit for import)
merge develop -D org: PR 2235 (customizing 'Orphaned images' container)
merge develop -D org: PR 2240 (Search image id 12151)
merge develop -D org: PR 2243 (omeroweb flake8 cleanup: unused imports)
merge develop -D org: PR 2244 (Webstart access limited)
merge develop -D org: PR 2248 (Update develop submodules)
merge develop -D org: PR 2249 (omeroweb flake8 cleanup: Remove unused variables)
merge develop -D org: PR 2251 (omero gateway flake8 cleanup: Fix failures and warnings)
merge develop -D org: PR 2253 (limit webtest getObjects() to 10)
merge develop -D org: PR 2254 (Remove Empty menu. (see #12157) (rebased onto develop))
merge develop -D org: PR 2256 (Tablet drag handling)
merge develop -D org: PR 2257 (Webstart index template2)
merge develop -D org: PR 2260 (OmeroPy unit tests flake8 (rebased onto develop))