internal/app: filter ops in implementation

This is cleaner and less error-prone, and should also result in negligibly less memory allocation.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/app/shim.go

@@ -48,11 +48,7 @@ type shimParams struct {
 }
 
 // valid checks shimParams to be safe for use.
-func (p *shimParams) valid() bool {
-	return p != nil &&
-		p.Ops != nil &&
-		p.PrivPID > 0
-}
+func (p *shimParams) valid() bool { return p != nil && p.PrivPID > 0 }
 
 // ShimMain is the main function of the shim process and runs as the unconstrained target user.
 func ShimMain() {