Revert "feat(uart): add uart7 support"

huangcm

2025-07-01 676035278781360996553c427a12bf358249ebf7

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FOUR
ONE
FOURTEEN
NINE
FIVE
TWELVE
SamePackagePublicEnum
basis: performed 10000 iterations
test1: performed 10000 iterations
test2: performed 10000 iterations
test3: performed 10000 iterations
Timing is acceptable.