Remove amartyasinha from cifmw-squad

No longer part of cifmw team

Signed-off-by: Amartya Sinha <amsinha@redhat.com>

Author: amartyasinha

OWNERS_ALIASES

@@ -12,7 +12,6 @@ aliases:
     - eshulman2
     - evallesp
     - bshewale
-    - amartyasinha
     - brjackma
     - michburk
     - nemarjan