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Sometimes you can have a great scene but it just doesn't need to be in the movie. If it's not progressing the plot, not progressing the story, not adding to the momentum, or if it's not purposefully serving a breath - it has got to go.

"Exclusive: Marvel’s Kevin Feige Talks THOR, AVENGERS, ANT-MAN, DOCTOR STRANGE, Animated Movies, Reveals What’s in Odin’s Vault". Interview with Steve 'Frosty' Weintraub, collider.com. May 1, 2011.
Sometimes you can have a great scene but it just doesn't need to be in the movie. If it's not progressing the plot, not progressing the story, not adding to the momentum, or if it's not purposefully serving a breath -