Remove beta arg from F1 class and functional (#5076)

* remove beta from F1

* remove from functional

Co-authored-by: Teddy Koker <[email protected]>

Author: s-rog

pytorch_lightning/metrics/classification/f_beta.py

@@ -212,7 +212,6 @@ class F1(FBeta):
     def __init__(
         self,
         num_classes: int = 1,
-        beta: float = 1.0,
         threshold: float = 0.5,
         average: str = "micro",
         multilabel: bool = False,

pytorch_lightning/metrics/functional/f_beta.py

@@ -110,7 +110,6 @@ def f1(
         preds: torch.Tensor,
         target: torch.Tensor,
         num_classes: int,
-        beta: float = 1.0,
         threshold: float = 0.5,
         average: str = "micro",
         multilabel: bool = False