MAINT: random: Simplify a bit of code in 'disc()' in _common.pyx.

Remove 'and is_scalar' from expressions where we know is_scalar is True.

Author: WarrenWeckesser

numpy/random/_common.pyx

@@ -918,31 +918,33 @@ cdef object disc(void *func, void *state, object size, object lock,
         else:
             raise NotImplementedError("No vector path available")
 
+    # At this point, we know is_scalar is True.
+
     if narg_double > 0:
         _da = PyFloat_AsDouble(a)
-        if a_constraint != CONS_NONE and is_scalar:
+        if a_constraint != CONS_NONE:
             check_constraint(_da, a_name, a_constraint)
 
         if narg_double > 1:
             _db = PyFloat_AsDouble(b)
-            if b_constraint != CONS_NONE and is_scalar:
+            if b_constraint != CONS_NONE:
                 check_constraint(_db, b_name, b_constraint)
         elif narg_int64 == 1:
             _ib = <int64_t>b
-            if b_constraint != CONS_NONE and is_scalar:
+            if b_constraint != CONS_NONE:
                 check_constraint(<double>_ib, b_name, b_constraint)
     else:
         if narg_int64 > 0:
             _ia = <int64_t>a
-            if a_constraint != CONS_NONE and is_scalar:
+            if a_constraint != CONS_NONE:
                 check_constraint(<double>_ia, a_name, a_constraint)
         if narg_int64 > 1:
             _ib = <int64_t>b
-            if b_constraint != CONS_NONE and is_scalar:
+            if b_constraint != CONS_NONE:
                 check_constraint(<double>_ib, b_name, b_constraint)
         if narg_int64 > 2:
             _ic = <int64_t>c
-            if c_constraint != CONS_NONE and is_scalar:
+            if c_constraint != CONS_NONE:
                 check_constraint(<double>_ic, c_name, c_constraint)
 
     if size is None: