OWNERS: Remove Vishwa

Like https://gerrit.openbmc.org/c/openbmc/phosphor-time-manager/+/70003

Vishwa is no longer associated with IBM and appears to have disengaged
from OpenBMC since 2022. Furthermore, his inactivity on Discord suggests
a lack of interest in OpenBMC. Consequently, it seems appropriate to
remove him from the maintainers list.

Vishwa - Thank you for your contributions to OpenBMC!

Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
Change-Id: Idb98261f8f2a8d87c4d84a19fde435039433bbf8
1 file changed