ICU-22724 Clean up import statements #1171

Job	Run time
icu4j-mvn-init-cache	23s
icu4c-windows-cygwin-gcc	24m 46s
icu4c-windows-msvc-postmerge (x64, Debug)	10m 11s
icu4c-windows-msvc-postmerge (x64, Release)	7m 49s
icu4c-store-perf-libs	0s
icu4c-windows-msvc-postmerge (x86, Debug)	12m 14s
icu4c-windows-msvc-postmerge (x86, Release)	8m 13s
icu4c-performance-tests	0s
icu4c-performance-tests-with-files	0s
icu4c-strsrchperf	0s
icu4j-little-endian-data-test	10m 7s
icu4j-normperf	0s
icu4j-decimalformatperf	0s
icu4j-unicodesetperf	0s
icu4j-ucharacterperf	0s
icu4j-dateformatperf	0s
icu4j-converterperf	0s
Copy perf data to remote repo for visualization	0s
	1h 13m 43s

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