DEV: dropped piqtree tests suite and dep from repo

Author: YapengLang

pyproject.toml

@@ -37,7 +37,6 @@ test = [
     "pytest-cov",
     "pytest-xdist",
     "nox",
-    "piqtree==0.4.0",
 ]
 dev = [
     "black",

tests/test_apps.py

@@ -122,13 +122,3 @@ def test_convert_piqtree_to_model_result(tree_name):
     res = converter(tree)
     res.lf.set_alignment(_algn)
     assert allclose(res.lf.lnL, tree.params["lnL"])
-
-
-def test_piqtree_app():
-    phylo = get_app("piqtree_phylo", "GTR")
-    tree = phylo(_algn)
-    lf_from = get_app("phylim_to_model_result")
-    result = lf_from(tree)
-    checker = get_app("phylim")
-    checked = checker(result)
-    assert isinstance(checked, PhyloLimitRec) == True