Remove unused variable left over from option refactor.

mesonbuild/build.py

diff --git a/mesonbuild/build.py b/mesonbuild/build.py
index 0c1e7e6..25428dc 100644
--- a/mesonbuild/build.py
+++ b/mesonbuild/build.py
@@ -521,7 +521,6 @@
     install: bool = False
     build_always_stale: bool = False
     extra_files: T.List[File] = field(default_factory=list)
-    override_options: InitVar[T.Optional[T.Dict[OptionKey, str]]] = None
 
     @abc.abstractproperty
     def typename(self) -> str:
@@ -531,7 +530,7 @@
     def type_suffix(self) -> str:
         pass
 
-    def __post_init__(self, overrides: T.Optional[T.Dict[OptionKey, str]]) -> None:
+    def __post_init__(self) -> None:
         # XXX: this should happen in the interpreter
         if has_path_sep(self.name):
             # Fix failing test 53 when this becomes an error.