Clean up some example warnings #3072

Job	Run time
Spelling, Style, Boards, Package, PIO	1m 21s
Build 4	2m 33s
Build 2	2m 32s
Build 0	1s
Build RP2350 0	2m 32s
Build 1	2m 31s
Build 5	2m 33s
Build RP2350 3	2m 33s
Build RP2350 2	2m 32s
Build 3	2m 32s
Build RP2350-RISCV 0	2m 32s
Build RP2350 1	2m 32s
Build RP2350-RISCV 4	1s
Build RP2350-RISCV 3	2m 32s
Build RP2350 4	48s
Build RP2350-RISCV 2	2m 32s
Build PlatformIO Examples	1m 20s
Build RP2350 5	1m 10s
Build RP2350-RISCV 5	1s
Windows	2m 37s
Build RP2350-RISCV 1	2m 32s
Mac (macOS-13)	2m 36s
Build Every Variant 1	2m 20s
Mac (macOS-14)	2m 38s
Build Every Variant 3	9s
Build TinyUSB Examples	2m 19s
Build Every Variant 0	1s
Build Every Variant 2	1s
	50m 21s

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