Remove secp256k1 from tests #1

Job	Run time
openssl-1.0.2u	2m 39s
openssl-1.1.0l	1m 51s
openssl-1.1.1w	1m 43s
openssl-3.0.13	2m 57s
openssl-3.1.5	2m 57s
openssl-3.2.1	3m 20s
libressl-3.1.5	2m 30s
libressl-3.2.7	2m 22s
libressl-3.3.6	2m 44s
libressl-3.4.3	2m 17s
libressl-3.5.3	2m 18s
libressl-3.6.3	2m 24s
libressl-3.7.3	2m 15s
libressl-3.8.2	2m 11s
openssl-3.0.13 fips	2m 53s
openssl-3.1.5 fips	3m 3s
openssl-3.2.1 fips	3m 26s
openssl-head	3m 57s
openssl-head fips	3m 31s
openssl-head no-legacy	4m 22s
ruby-versions / Generate Ruby versions	4s
ubuntu-22.04 2.7	57s
ubuntu-22.04 3.0	52s
ubuntu-22.04 3.1	1m 2s
ubuntu-22.04 3.2	1m 7s
ubuntu-22.04 3.3	59s
ubuntu-22.04 head	1m 3s
ubuntu-22.04 truffleruby	1m 26s
ubuntu-22.04 truffleruby-head	1m 34s
ubuntu-20.04 2.7	54s
ubuntu-20.04 3.0	55s
ubuntu-20.04 3.1	49s
ubuntu-20.04 3.2	52s
ubuntu-20.04 3.3	50s
ubuntu-20.04 head	50s
ubuntu-20.04 truffleruby-head	1m 29s
macos-latest 2.7	1m 22s
macos-latest 3.0	1m 15s
macos-latest 3.1	1m 28s
macos-latest 3.2	1m 3s
macos-latest 3.3	59s
macos-latest head	1m 2s
macos-latest truffleruby-head	1m 43s
windows-latest 2.7	4m 29s
windows-latest 3.0	4m 59s
windows-latest 3.1	4m 12s
windows-latest 3.2	4m 56s
windows-latest 3.3	4m 53s
windows-latest ucrt	3m 39s
windows-latest mswin	2m 43s
	1h 50m 6s

Provide feedback