config: Remove support for target.requires

target.requires was never a valid target_override. See
ARMmbed#162 for details.

Partially reverts 6a99b43.

src/mbed_tools/build/_internal/config/assemble_build_config.py

@@ -84,13 +84,7 @@ def _get_app_filter_labels(mbed_app_data: dict, config: Config) -> None:
 
 
 def _get_file_filter_overrides(mbed_app_data: dict) -> dict:
-    return {
-        "overrides": [
-            override
-            for override in mbed_app_data.get("overrides", [])
-            if override.modifier or override.name == "requires"
-        ]
-    }
+    return {"overrides": [override for override in mbed_app_data.get("overrides", []) if override.modifier]}
 
 
 @dataclass(frozen=True)

src/mbed_tools/build/_internal/config/config.py

@@ -35,10 +35,6 @@ def __setitem__(self, key: Hashable, item: Any) -> None:
     def _handle_overrides(self, overrides: Iterable[Override]) -> None:
         for override in overrides:
             logger.debug("Applying override '%s.%s'='%s'", override.namespace, override.name, repr(override.value))
-            if override.name == "requires":
-                self.data["requires"] = self.data.get("requires", set()) | override.value
-                continue
-
             if override.name in self.data:
                 _apply_override(self.data, override)
                 continue

tests/build/test_generate_config.py

@@ -456,30 +456,6 @@ def test_requires_config_option(program):
     assert "MBED_LFS_READ_SIZE=64" not in config_text
 
 
-def test_target_requires_config_option(program):
-    create_mbed_app_json(program.root, target_overrides={"*": {"target.requires": ["ble"]}})
-    create_mbed_lib_json(
-        program.mbed_os.root / "bare-metal" / "mbed_lib.json",
-        "ble",
-        target_overrides={"*": {"target.requires": ["platform"]}},
-    )
-    create_mbed_lib_json(
-        program.mbed_os.root / "platform" / "mbed_lib.json", "platform", config={"stdio-baud-rate": {"value": 9600}},
-    )
-    create_mbed_lib_json(
-        program.mbed_os.root / "storage" / "mbed_lib.json",
-        "filesystem",
-        config={"read_size": {"macro_name": "MBED_LFS_READ_SIZE", "value": 64}},
-    )
-
-    generate_config("K64F", "GCC_ARM", program)
-
-    config_text = (program.files.cmake_build_dir / CMAKE_CONFIG_FILE).read_text()
-
-    assert "MBED_CONF_PLATFORM_STDIO_BAUD_RATE=9600" in config_text
-    assert "MBED_LFS_READ_SIZE=64" not in config_text
-
-
 def test_config_parsed_when_mbed_os_outside_project_root(program_in_mbed_os_subdir, matching_target_and_filter):
     program = program_in_mbed_os_subdir
     target, target_filter = matching_target_and_filter