Removed invalid test of strict_syntax -inf and -∞. These are equal (at least according to SymPy and correctly parse.

Author: m-messer

app/tests/symbolic_evaluation_tests.py

@@ -775,10 +775,6 @@ def test_warning_inappropriate_symbol(self):
                 '(0,002*6800*v)/1,2',
                 '(0.002*6800*v)/1.2'
             ),
-            (
-                '-∞',
-                '-inf'
-            ),
             (
                 'x.y',
                 'x*y'