What are the polite and neutral versions of “cut the bull*’?

Are you referring to

cut the crap

That's very interesting. Now, I was hoping you could help me with [repeat request].

Cut to the chase...

Let's try to focus on "x"...

Let's get to the heart of the matter...

Coming back to the point...

We're off topic, let's refocus...

Let's not fool around...

...and the 'not so polite and not very neutral' version from my years as a craps supervisor in a casino, "Cut the f-ing bullshit already, because if you try to pile it any deeper we're all going to f-ing drown."

A slightly more polite and a lot less vulgar phrase is, let's get to it (the point).

Some useful expressions from American politics:

1. No malarkey!

“Malarkey” is an old-fashioned Irish-American slang word meaning “bull*” (Urban Dictionary). I wouldn't recommend actually using this one.

2. Straight talk

This is a common expression, and can be used as follows:

Hey, straight talk, what’s your opinion about “x”?

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Another expression that’s worth mentioning is:

3. Don’t beat around the bush.

For example,

Let’s not beat around the bush and address this issue directly.

From lexico: Let's get down to business.

"Can we stay on point?" "Can we stick to the matter at hand."

I had a professor who constantly would remind us to "Keep it terse, pithy and to the point." He could easily have added "breviloquent" to that list of words.

(Of course the humor was that he was being wordy in saying that we should be brief.)