remove unused imports from tx_columnshard.proto

[uzhastik]

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[github-actions[bot]]

:white_circle: 2024-06-28 11:43:45 UTC Pre-commit check for ba5cc180cc679b8ea952aa35a254e311d1c472d7 has started. :white_circle: 2024-06-28 11:46:19 UTC Build linux-x86_64-relwithdebinfo is running... :green_circle: 2024-06-28 12:36:25 UTC Build successful. :white_circle: 2024-06-28 12:36:36 UTC Tests are running... :red_circle: 2024-06-28 14:45:28 UTC Some tests failed, follow the links below.

Test history	Test log	TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
39564	34346	0	1	5197	20

:green_circle: 2024-06-28 14:46:12 UTC ydbd size 8.4 GiB changed* by -32 Bytes, which is <= 0 Bytes vs main: OK	ydbd size dash	main: c426e834cb85687004bbee6e80d054ee4fcf9de2	merge: ba5cc180cc679b8ea952aa35a254e311d1c472d7	diff	diff %
ydbd size	8 998 134 872 Bytes	8 998 134 840 Bytes	-32 Bytes	-0.000%
ydbd stripped size	492 071 304 Bytes	492 071 304 Bytes	0 Bytes	0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions[bot]]

:white_circle: 2024-06-28 12:01:47 UTC Pre-commit check for ba5cc180cc679b8ea952aa35a254e311d1c472d7 has started. :white_circle: 2024-06-28 12:05:00 UTC Build linux-x86_64-release-asan is running... :green_circle: 2024-06-28 12:35:11 UTC Build successful. :white_circle: 2024-06-28 12:35:24 UTC Tests are running... :red_circle: 2024-06-28 14:42:05 UTC Some tests failed, follow the links below.

Test history	Test log	TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
11100	10520	0	83	323	174

:green_circle: 2024-06-28 14:42:47 UTC ydbd size 5.5 GiB changed* by -96 Bytes, which is <= 0 Bytes vs main: OK	ydbd size dash	main: c426e834cb85687004bbee6e80d054ee4fcf9de2	merge: ba5cc180cc679b8ea952aa35a254e311d1c472d7	diff	diff %
ydbd size	5 901 830 304 Bytes	5 901 830 208 Bytes	-96 Bytes	-0.000%
ydbd stripped size	1 268 873 416 Bytes	1 268 873 352 Bytes	-64 Bytes	-0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions[bot]]

:white_circle: 2024-06-28 12:06:42 UTC Pre-commit check for ba5cc180cc679b8ea952aa35a254e311d1c472d7 has started. :white_circle: 2024-06-28 12:09:43 UTC Build linux-x86_64-release-clang14 is running... :green_circle: 2024-06-28 12:54:26 UTC Build successful.