Remove some debugging inserts

tsdate/hypergeo.py

@@ -137,9 +137,9 @@ def _hyp2f1_taylor_series(a, b, c, z):
     To avoid overflow, returns the function value on a log scale and the
     derivatives divided by the (unlogged) function value.
     """
-    if not (1.0 > z >= 0.0 and a >= 0.0 and b >= 0.0 and c > 0.0):
-        print("bad taylor:", a, b, c, z)  # DEBUG
-        raise Invalid2F1("Taylor expansion requires nonnegative arguments")
+    assert 1.0 > z >= 0.0
+    if not (a >= 0.0 and b >= 0.0 and c > 0.0):
+        raise Invalid2F1("Negative parameters in Taylor series")
 
     if z == 0.0:
         val = 0.0
@@ -416,9 +416,6 @@ def _hyp2f1(a_i, b_i, a_j, b_j, y, mu):
     Overflow protection entails log-transforming the function value,
     and dividing the gradient by the function value.
     """
-    a = a_j
-    b = a_j + a_i + y
-    c = a_j + y + 1
     z = (mu - b_j) / (mu + b_i)
     assert z < 1.0, "Invalid argument"
     if z > 0.0: