Fix coverage configuration

Exclude line of TYPE_CHECKING, and avoid using too many exclude patterns (unsafe).

.coveragerc

@@ -6,10 +6,6 @@ parallel = True
 [report]
 exclude_lines =
     pragma: no cover
-    except ImportError
-    raise ImportError
-    raise NotImplementedError
-    return NotImplemented
 
 fail_under = 90
 show_missing = True

baikal/_core/data_placeholder.py

@@ -47,6 +47,6 @@ def __repr__(self):
     def __lt__(self, other):
         if self.__class__ is other.__class__:
             return self._name < other.name
-        return NotImplemented
+        return NotImplemented  # pragma: no cover
 
     # TODO: Use functools.total_ordering and follow best practices

baikal/_core/step.py

@@ -369,7 +369,7 @@ class Step(_StepBase):
     >>> logreg = LogisticRegression(C=2.0)
     """
 
-    if TYPE_CHECKING:
+    if TYPE_CHECKING:  # pragma: no cover
 
         def fit(self, X, y, **fit_params):
             return self

baikal/plot.py

@@ -4,7 +4,7 @@
 
 try:
     import pydot
-except ImportError:
+except ImportError:  # pragma: no cover
     raise ImportError(
         "Could not import pydot package."
         "You can install with `pip install pydot` or"