GH1049 Deprecate Index and Grouper methods for migration to 2.0

Author: loicdiridollou

pandas-stubs/core/groupby/grouper.pyi

@@ -72,5 +72,3 @@ class Grouping:
     def result_index(self) -> Index: ...
     @cache_readonly
     def group_index(self) -> Index: ...
-    @cache_readonly
-    def groups(self) -> dict[Hashable, np.ndarray]: ...

pandas-stubs/core/indexes/base.pyi

@@ -309,14 +309,6 @@ class Index(IndexOpsMixin[S1]):
     def is_unique(self) -> bool: ...
     @property
     def has_duplicates(self) -> bool: ...
-    def is_boolean(self) -> bool: ...
-    def is_integer(self) -> bool: ...
-    def is_floating(self) -> bool: ...
-    def is_numeric(self) -> bool: ...
-    def is_object(self) -> bool: ...
-    def is_categorical(self) -> bool: ...
-    def is_interval(self) -> bool: ...
-    def holds_integer(self): ...
     @property
     def inferred_type(self) -> _str: ...
     def __reduce__(self): ...