fix bug in adamax solution

Author: mavleo96

questions/x_adamax-optimizer/solution.py

@@ -24,7 +24,6 @@ def adamax_optimizer(parameter, grad, m, u, t, learning_rate=0.002, beta1=0.9, b
     assert 0 <= beta1 < 1, "Beta1 must be between 0 and 1"
     assert 0 <= beta2 < 1, "Beta2 must be between 0 and 1"
     assert epsilon > 0, "Epsilon must be positive"
-    assert all(m >= 0) if isinstance(m, np.ndarray) else m >= 0, "m must be non-negative"
     assert all(u >= 0) if isinstance(u, np.ndarray) else u >= 0, "u must be non-negative"
 
     # Update biased first moment estimate