[SymForce] Remove deprecated stuff

This has all been deprecated for a couple releases, so I'm removing

Tested the matplotlib thing is also fine now

Reviewers: bradley,nathan,hayk,ryan-b,samuel-w
Topic: sf-deprecated
GitOrigin-RevId: 8c9c3417ab237eedb487de858209dcc3dd8181fe

symforce/__init__.py

@@ -221,19 +221,6 @@ def get_symbolic_api() -> str:
     return _symbolic_api
 
 
-# NOTE(hayk): Remove this after they are present in a release or two.
-
-
-def get_backend() -> str:
-    warnings.warn("`get_backend` is deprecated, use `get_symbolic_api`", FutureWarning)
-    return get_symbolic_api()
-
-
-def set_backend(name: str) -> None:
-    warnings.warn("`set_backend` is deprecated use `set_symbolic_api`", FutureWarning)
-    return set_symbolic_api(name)
-
-
 # --------------------------------------------------------------------------------
 # Default epsilon
 # --------------------------------------------------------------------------------

symforce/notebook_util.py

@@ -6,17 +6,9 @@
 """
 Helpers for interactive use in a Jupyter notebook with an IPython kernel.
 """
-import warnings
 
 import IPython
-import matplotlib
 import pygments
-
-# NOTE(aaron): This is currently nice-to-have, otherwise every time we display something LaTeX we
-# get this warning.  It's fixed in IPython master (https://github.com/ipython/ipython/pull/12889),
-# so once that fix is in a release this can be removed
-warnings.filterwarnings("ignore", category=matplotlib.MatplotlibDeprecationWarning)
-
 import sympy as sympy_py
 
 sympy_py.init_printing()