ssl: remove redundant ossl_ssl_ex_vcb_idx #384

Job	Run time
openssl-1.0.2u	2m 24s
openssl-1.1.0l	1m 41s
openssl-1.1.1w	1m 53s
openssl-3.0.14	3m 16s
openssl-3.1.6	3m 20s
ruby-versions / Generate Ruby versions	3s
openssl-3.2.2	3m 34s
openssl-3.3.1	3m 32s
openssl-master	3m 43s
libressl-3.1.5	2m 15s
libressl-3.2.7	2m 18s
libressl-3.3.6	2m 15s
libressl-3.4.3	2m 21s
libressl-3.5.3	2m 17s
libressl-3.6.3	2m 37s
libressl-3.7.3	2m 24s
libressl-3.8.4	2m 16s
libressl-3.9.2	2m 13s
openssl-3.0.14 with fips provider	2m 44s
openssl-3.1.6 with fips provider	2m 55s
openssl-3.2.2 with fips provider	3m 14s
openssl-3.3.1 with fips provider	3m 28s
openssl-master with fips provider	3m 31s
openssl-3.3.1 without legacy provider	3m 45s
ubuntu-22.04 2.7	1m 0s
ubuntu-22.04 3.0	56s
ubuntu-22.04 3.1	1m 4s
ubuntu-22.04 3.2	1m 4s
ubuntu-22.04 3.3	1m 2s
ubuntu-22.04 head	1m 4s
ubuntu-22.04 truffleruby	1m 42s
ubuntu-22.04 truffleruby-head	1m 46s
ubuntu-20.04 2.7	1m 3s
ubuntu-20.04 3.0	1m 0s
ubuntu-20.04 3.1	58s
ubuntu-20.04 3.2	57s
ubuntu-20.04 3.3	57s
ubuntu-20.04 head	57s
ubuntu-20.04 truffleruby	1m 41s
ubuntu-20.04 truffleruby-head	1m 48s
macos-latest 2.7	53s
macos-latest 3.0	43s
macos-latest 3.1	41s
macos-latest 3.2	43s
macos-latest 3.3	47s
macos-latest head	45s
macos-latest truffleruby	1m 15s
macos-latest truffleruby-head	1m 4s
windows-latest 2.7	6m 49s
windows-latest 3.0	4m 41s
windows-latest 3.1	4m 18s
windows-latest 3.2	5m 9s
windows-latest 3.3	5m 3s
windows-latest head	4m 28s
windows-latest ucrt	4m 17s
windows-latest mswin	3m 27s
	2h 8m 1s

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