cleanup: poll_on no longer required in new_idle

[zyuiop]

While trying to understand the code of the executor a bit better, I found an old async { } block that no longer required to be async and cleaned it out.

[github-actions]

Benchmark Results

Benchmark	Current: b933294	Previous: 40e0c6e	Performance Ratio
startup_benchmark Build Time	136.25 s	136.14 s	1.00
startup_benchmark File Size	0.91 MB	0.90 MB	1.01
Startup Time - 1 core	0.95 s (±0.01 s)	0.94 s (±0.02 s)	1.01
Startup Time - 2 cores	0.95 s (±0.02 s)	0.92 s (±0.03 s)	1.03
Startup Time - 4 cores	0.95 s (±0.03 s)	0.96 s (±0.03 s)	0.99
multithreaded_benchmark Build Time	139.36 s	140.97 s	0.99
multithreaded_benchmark File Size	0.95 MB	1.01 MB	0.95
Multithreaded Pi Efficiency - 2 Threads	2.68 % (±12.86 %)	2.17 % (±10.40 %)	1.24
Multithreaded Pi Efficiency - 4 Threads	1.55 % (±7.46 %)	1.51 % (±7.26 %)	1.03
Multithreaded Pi Efficiency - 8 Threads	0.73 % (±3.51 %)	0.77 % (±3.68 %)	0.95
micro_benchmarks Build Time	171.82 s	171.42 s	1.00
micro_benchmarks File Size	0.96 MB	1.01 MB	0.95
Scheduling time - 1 thread	3.02 ticks (±14.48 ticks)	2.77 ticks (±13.29 ticks)	1.09
Scheduling time - 2 threads	1.35 ticks (±6.48 ticks)	1.75 ticks (±8.39 ticks)	0.77
Micro - Time for syscall (getpid)	0.19 ticks (±0.89 ticks)	0.12 ticks (±0.58 ticks)	1.53
Memcpy speed - (built_in) block size 4096	988.92 MByte/s (±4746.84 MByte/s)	1816.86 MByte/s (±8720.93 MByte/s)	0.54
Memcpy speed - (built_in) block size 1048576	729.05 MByte/s (±3499.43 MByte/s)	745.11 MByte/s (±3576.55 MByte/s)	0.98
Memcpy speed - (built_in) block size 16777216	213.32 MByte/s (±1023.93 MByte/s)	219.45 MByte/s (±1053.36 MByte/s)	0.97
Memset speed - (built_in) block size 4096	1304.35 MByte/s (±6260.87 MByte/s)	1875.00 MByte/s (±9000.00 MByte/s)	0.70
Memset speed - (built_in) block size 1048576	1297.90 MByte/s (±6229.92 MByte/s)	1029.20 MByte/s (±4940.18 MByte/s)	1.26
Memset speed - (built_in) block size 16777216	916.27 MByte/s (±4398.08 MByte/s)	924.64 MByte/s (±4438.25 MByte/s)	0.99
Memcpy speed - (rust) block size 4096	1333.33 MByte/s (±6400.00 MByte/s)	1411.76 MByte/s (±6776.47 MByte/s)	0.94
Memcpy speed - (rust) block size 1048576	577.76 MByte/s (±2773.24 MByte/s)	693.90 MByte/s (±3330.73 MByte/s)	0.83
Memcpy speed - (rust) block size 16777216	203.63 MByte/s (±977.44 MByte/s)	219.67 MByte/s (±1054.40 MByte/s)	0.93
Memset speed - (rust) block size 4096	1250.00 MByte/s (±6000.00 MByte/s)	1791.04 MByte/s (±8597.01 MByte/s)	0.70
Memset speed - (rust) block size 1048576	1324.24 MByte/s (±6356.35 MByte/s)	1105.00 MByte/s (±5304.01 MByte/s)	1.20
Memset speed - (rust) block size 16777216	858.68 MByte/s (±4121.67 MByte/s)	954.96 MByte/s (±4583.81 MByte/s)	0.90
alloc_benchmarks Build Time	168.31 s	157.27 s	1.07
alloc_benchmarks File Size	0.97 MB	0.97 MB	1.00
Allocations - Allocation success	2.00 % (±13.86 %)	2.00 % (±13.86 %)	1
Allocations - Deallocation success	1.40 % (±9.72 %)	1.40 % (±9.67 %)	1.01
Allocations - Pre-fail Allocations	2.00 % (±13.86 %)	2.00 % (±13.86 %)	1
Allocations - Average Allocation time	245.27 Ticks (±1699.64 Ticks)	262.62 Ticks (±1819.84 Ticks)	0.93
Allocations - Average Allocation time (no fail)	245.27 Ticks (±1699.64 Ticks)	262.62 Ticks (±1819.84 Ticks)	0.93
Allocations - Average Deallocation time	16.49 Ticks (±114.28 Ticks)	17.05 Ticks (±118.18 Ticks)	0.97
mutex_benchmark Build Time	165.23 s	159.65 s	1.03
mutex_benchmark File Size	0.96 MB	1.01 MB	0.95
Mutex Stress Test Average Time per Iteration - 1 Threads	0.34 ns (±2.36 ns)	0.36 ns (±2.49 ns)	0.94
Mutex Stress Test Average Time per Iteration - 2 Threads	0.44 ns (±3.05 ns)	0.38 ns (±2.63 ns)	1.16

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