Remove unused ijwb_tests target
Remove unused ijwb_tests target

With https://github.com/bazelbuild/intellij/pull/2517, our buildkite
configuration uses the new ijwb_ce_tests target.

PiperOrigin-RevId: 367602906

bazelbuild/intellij,bazelbuild/intellij,bazelbuild/intellij,bazelbuild/intellij,bazelbuild/intellij,bazelbuild/intellij,bazelbuild/intellij