Professional Wrestling 3e vs. 4e Acting/Performance
 

3e:

“Primary Skills: Brawling, Wrestling, Wrestling Sport.
Secondary Skills: Acting, Performance, Tournament Law (Pro Wrestling).
Optional Skills: Acrobatics.
Maneuvers: Arm Lock, Choke Hold, Drop Kick [2 points], Ear Clap, Head
Butt, Neck Snap, Piledriver (if the GM permits), Stamp Kick.
Cinematic Skills and Maneuvers: None.”

4e:

“Skills: Brawling Art; Wrestling Art; Wrestling Sport.
Techniques: Breakfall; Choke Hold; Drop Kick; Elbow Drop; Head Butt; Stamp Kick; Wrench (Limb).
Cinematic Skills: Breaking Blow; Power Blow.
Cinematic Techniques: Backbreaker; Hand Catch; Piledriver; Roll with Blow; Springing Attack (Brawling Art).
Perks: Shtick (Varies); Skill Adaptation (Varies); Special Exercises (DR 1 with Tough Skin); Unusual Training (Roll with Blow, Only on the spring-loaded ring floor or against the ropes).

Optional Traits
Secondary Characteristics: Improved FP and HP.
Advantages: Ally (Tag-team partner); Charisma; Hard to Subdue; High Pain Threshold; Patron (Wrestling organization); Reputation (Good Guy, from fans).
Disadvantages: Fat; Gigantism; Reputation (Bad Guy, from fans); Reputation (Signature move).
Skills: Acrobatics; Brawling; Games (Professional Wrestling); Hobby Skill (Feats of Strength); Performance; Stage Combat; Two-Handed Axe/Mace (for chairs!);
Wrestling.
Techniques: Arm Lock; Exotic Hand Strike; Hammer Fist;
Head Lock; Neck Snap.”

Is there a reason why Acting is absent in 4e? Was folded into Performance?

Re: Professional Wrestling 3e vs. 4e Acting/Performance
 

Maybe because kayfabe is only maintained during shows and not outside of shows now.

Re: Professional Wrestling 3e vs. 4e Acting/Performance
 

To expand on this, at least in 4e, Acting is the skill of convincing people of things that aren't true while Performance is the skill of giving an entertaining, well, performance - be this acting in a movie/play, doing stage combat (although Combat Sport and Combat Art help there), or whatever. There can be some overlap in that both may need to "stay in character" when interacting with others in an unscripted manner (at least for improv), and there's confusion in that one would think Acting would be the skill of actors rather than confidence men. Also, at least cinematically, it's expected that skilled actors (that is, those with high relevant Performance skill) will be able to do Acting with minimal difficulty.

So, back when Professional Wrestling involved keeping the fact it was all staged a secret (the "kayfabe" TGLS makes note of), professional wrestlers often needed Acting and Performance. Now that it's an open secret, they don't really need Acting, only Performance, although for a campaign set back when kayfabe was in full effect you may still want Acting for your characters.