MNT remove seaborn as dep, remove configure_plt, add matplotlib as an optional dep (#300)

Author: samuelstjean

.coveragerc

@@ -5,7 +5,6 @@ branch = True
 source = celer
 include = */celer/*
 omit = */setup.py
-       */celer/plot_utils.py
 
 [report]
 exclude_lines =

celer/plot_utils.py

@@ -11,10 +11,8 @@
 
 from celer import GroupLassoCV, LassoCV
 from celer.datasets import make_correlated_data
-from celer.plot_utils import configure_plt
 
 print(__doc__)
-configure_plt(fontsize=16)
 
 # Generating X, y, and true regression coefs with 4 groups of 5 non-zero values
 

examples/plot_group_lasso.py

@@ -14,10 +14,8 @@
 from sklearn.model_selection import KFold
 
 from celer import LassoCV
-from celer.plot_utils import configure_plt
 
 print(__doc__)
-configure_plt()
 
 print("Loading data...")
 dataset = fetch_openml("leukemia")

examples/plot_lasso_cv.py

@@ -6,8 +6,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "celer"
 dependencies =[
-    'seaborn>=0.7', 'matplotlib>=2.0.0', 'libsvmdata>=0.3',
-    'scikit-learn>=1.0', 'xarray', 'download', 'tqdm'
+    'libsvmdata>=0.3', 'scikit-learn>=1.0', 'xarray', 'download', 'tqdm'
 ]
 description = "A fast algorithm with dual extrapolation for sparse problems"
 authors = [
@@ -29,6 +28,6 @@ repository = "https://github.com/mathurinm/celer.git"
 
 [project.optional-dependencies]
 doc = [
-    "numpydoc", "pandas", "pillow",
+    "numpydoc", "pandas", "pillow", "matplotlib",
     "furo", "sphinx-copybutton", "sphinx-gallery"
-]
+]