core.common: move away import related stuff to my.core.utils.imports

moving without backward compatibility, since it's extremely unlikely they are used for any external modules

in fact, unclear if these methods still have much value at all, but keeping for now just in case

my/core/common.py

@@ -34,37 +34,6 @@ from .compat import deprecated
 # some helper functions
 PathIsh = Union[Path, str]
 
-# TODO only used in tests? not sure if useful at all.
-def import_file(p: PathIsh, name: Optional[str] = None) -> types.ModuleType:
-    p = Path(p)
-    if name is None:
-        name = p.stem
-    import importlib.util
-    spec = importlib.util.spec_from_file_location(name, p)
-    assert spec is not None, f"Fatal error; Could not create module spec from {name} {p}"
-    foo = importlib.util.module_from_spec(spec)
-    loader = spec.loader; assert loader is not None
-    loader.exec_module(foo)
-    return foo
-
-
-def import_from(path: PathIsh, name: str) -> types.ModuleType:
-    path = str(path)
-    try:
-        sys.path.append(path)
-        import importlib
-        return importlib.import_module(name)
-    finally:
-        sys.path.remove(path)
-
-
-def import_dir(path: PathIsh, extra: str='') -> types.ModuleType:
-    p = Path(path)
-    if p.parts[0] == '~':
-        p = p.expanduser() # TODO eh. not sure about this..
-    return import_from(p.parent, p.name + extra)
-
-
 from .logging import setup_logger, LazyLogger