Drop deprecated `streamablehttp_client` (#1836) #552

Job	Run time
checks / readme-snippets	11s
checks / pre-commit	35s
checks / test (3.10, highest, windows-latest)	3m 29s
checks / test (3.10, highest, ubuntu-latest)	46s
checks / test (3.12, highest, ubuntu-latest)	51s
checks / test (3.12, lowest-direct, ubuntu-latest)	51s
checks / test (3.11, lowest-direct, windows-latest)	2m 28s
checks / test (3.11, highest, windows-latest)	2m 35s
checks / test (3.11, lowest-direct, ubuntu-latest)	45s
checks / test (3.14, highest, windows-latest)	2m 29s
checks / test (3.14, highest, ubuntu-latest)	1m 17s
checks / test (3.11, highest, ubuntu-latest)	46s
checks / test (3.12, lowest-direct, windows-latest)	3m 24s
checks / test (3.10, lowest-direct, windows-latest)	2m 19s
checks / test (3.13, highest, windows-latest)	2m 32s
checks / test (3.13, lowest-direct, ubuntu-latest)	47s
checks / test (3.12, highest, windows-latest)	3m 55s
checks / test (3.14, lowest-direct, windows-latest)	2m 20s
checks / test (3.13, highest, ubuntu-latest)	45s
checks / test (3.10, lowest-direct, ubuntu-latest)	48s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 10s
checks / test (3.13, lowest-direct, windows-latest)	2m 20s
	37m 23s

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