Optimized bundle build doesn't respect `rego.v1` and `future.keywords` imports

[johanfylling]

When building a bundle from the following module with opa build -O1:

package test

import rego.v1

# METADATA
# entrypoint: true
p if {
    input.x == 1
}

the resulting optimized support module will drop the rego.v1 import and if keyword:

package test

p {
    input.x = 1
}

The same issue occurs when the original module imports future.keywords instead of rego.v1.

[stale]

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