TST: Remove duplicate font tests

- matplotlib.tests.test_backend_pdf::test_embed_fonts is the same as
  `test_multi_font_type3` and `test_multi_font_type42`
- matplotlib.tests.test_ft2font::test_font_fallback_chinese is the same
  as `test_fallback_smoke` except with Chinese fonts.

Author: QuLogic

lib/matplotlib/tests/test_backend_pdf.py

@@ -13,7 +13,6 @@
 )
 from matplotlib.cbook import _get_data_path
 from matplotlib.ft2font import FT2Font
-from matplotlib.font_manager import findfont, FontProperties
 from matplotlib.backends._backend_pdf_ps import get_glyphs_subset, font_as_file
 from matplotlib.backends.backend_pdf import PdfPages
 from matplotlib.patches import Rectangle
@@ -42,22 +41,6 @@ def test_use14corefonts():
     ax.axhline(0.5, linewidth=0.5)
 
 
-@pytest.mark.parametrize('fontname, fontfile', [
-    ('DejaVu Sans', 'DejaVuSans.ttf'),
-    ('WenQuanYi Zen Hei', 'wqy-zenhei.ttc'),
-])
-@pytest.mark.parametrize('fonttype', [3, 42])
-def test_embed_fonts(fontname, fontfile, fonttype):
-    if Path(findfont(FontProperties(family=[fontname]))).name != fontfile:
-        pytest.skip(f'Font {fontname!r} may be missing')
-
-    rcParams['pdf.fonttype'] = fonttype
-    fig, ax = plt.subplots()
-    ax.plot([1, 2, 3])
-    ax.set_title('Axes Title', font=fontname)
-    fig.savefig(io.BytesIO(), format='pdf')
-
-
 def test_multipage_pagecount():
     with PdfPages(io.BytesIO()) as pdf:
         assert pdf.get_pagecount() == 0

lib/matplotlib/tests/test_ft2font.py

@@ -8,7 +8,6 @@
 import matplotlib as mpl
 from matplotlib import ft2font
 from matplotlib.testing import _gen_multi_font_text
-from matplotlib.testing.decorators import check_figures_equal
 import matplotlib.font_manager as fm
 import matplotlib.path as mpath
 import matplotlib.pyplot as plt
@@ -864,30 +863,6 @@ def test_fallback_smoke(fmt):
     fig.savefig(io.BytesIO(), format=fmt)
 
 
-@pytest.mark.parametrize('family_name, file_name',
-                         [("WenQuanYi Zen Hei",  "wqy-zenhei"),
-                          ("Noto Sans CJK JP", "NotoSansCJK"),
-                          ("Noto Sans TC", "NotoSansTC-Regular.otf")]
-                         )
-@check_figures_equal(extensions=["png", "pdf", "eps", "svg"])
-def test_font_fallback_chinese(fig_test, fig_ref, family_name, file_name):
-    fp = fm.FontProperties(family=[family_name])
-    if file_name not in Path(fm.findfont(fp)).name:
-        pytest.skip(f"Font {family_name} ({file_name}) is missing")
-
-    text = ["There are", "几个汉字", "in between!"]
-
-    plt.rcParams["font.size"] = 20
-    test_fonts = [["DejaVu Sans", family_name]] * 3
-    ref_fonts = [["DejaVu Sans"], [family_name], ["DejaVu Sans"]]
-
-    for j, (txt, test_font, ref_font) in enumerate(
-            zip(text, test_fonts, ref_fonts)
-    ):
-        fig_ref.text(0.05, .85 - 0.15*j, txt, family=ref_font)
-        fig_test.text(0.05, .85 - 0.15*j, txt, family=test_font)
-
-
 @pytest.mark.parametrize("font_list",
                           [['DejaVu Serif', 'DejaVu Sans'],
                            ['DejaVu Sans Mono']],