Minor: Clippy - Simplified conditional logic in transition.rs.

[martinfrances107]

Just a couple of clippy fixes, only one is worth highlighting

all I have to say is when I draw out the equivalent logic elements this makes sense to me.

warning: this boolean expression can be simplified
   --> leptos/src/transition.rs:122:24
    |
122 |                       if (has_local_only && child_runs.get() > 0)
    |  ________________________^
123 | |                         || !has_local_only
    | |__________________________________________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
    = note: `#[warn(clippy::nonminimal_bool)]` on by default

[martinfrances107]

This build failed

"No space left on device"

[gbj]

Thanks! We've added a couple more examples and tests so it's straining CI now occasionally, will fix independently of this.