The daemon socket tests relied on an external assertion library, which
increased the module's dependency footprint and deviated from Go's
idiomatic testing patterns.
This commit introduces a leaner testing approach using the standard
library:
- Replace testify/assert calls with standard if checks and t.Errorf
- Remove testify and associated indirects from go.mod
These changes preserve existing test behavior while simplifying the
build process and reducing external maintenance overhead.
520518c68b