$ rg -A1 '1.30.0.dev0'
src/python/pants/engine/selectors.py
140:            deprecation_start_version="1.30.0.dev0",
141-            removal_version="1.31.0.dev0",

src/python/pants/engine/rules.py
101:            deprecation_start_version="1.30.0.dev0",
102-            removal_version="1.31.0.dev0",

src/python/pants/engine/legacy/graph.py
459:        removal_version="1.30.0.dev0",
460-        entity_description="Custom V1 targets not having a Target API binding",

src/python/pants/core/util_rules/external_tool.py
150:            removal_version="1.30.0.dev0",
151-            removal_hint="Use --known-versions instead.",

src/python/pants/backend/codegen/protobuf/java/protobuf_gen.py
181:                removal_version="1.30.0.dev0",
182-                entity_description="Importing from .protos embedded in remote JAR files.",

src/python/pants/backend/project_info/tasks/filedeps.py
42:            removal_version="1.30.0.dev0",
43-            hint_message=(

src/python/pants/option/arg_splitter.py
220:            removal_version="1.30.0.dev0",
221-            entity_description="Ambiguous scopes for passthrough args",

src/python/pants/option/options_test.py
866:        # TODO: Ownership of passthrough args will go away in 1.30.0.dev0, and all scopes that claim
867-        # passthrough args will receive them, regardless of position. This test should then shrink

src/python/pants/option/global_options.py
49:            removal_version="1.30.0.dev0",
50-            entity_description="--files-not-found-behavior=ignore",

src/python/pants/option/options.py
330:        # NB: The concept of passthru argument "ownership" will go away in 1.30.0.dev0, at which
331-        # point _all_ scopes which register passthrough args will receive them and this method can

src/python/pants/backend/jvm/tasks/unpack_jars.py
53:            removal_version="1.30.0.dev0",
54-            entity_description="The `unpack-jars` goal",

src/python/pants/backend/jvm/tasks/ivy_outdated.py
70:            removal_version="1.30.0.dev0",
71-            entity_description="The `outdated` goal",