remove four duplicate tests from script_tests.json

Summary:
These are identical to the preceding four test cases.
For the curious: they were introduced like this in 2014 by Peter Todd:
bitcoin/bitcoin#3860

Test Plan: `make check`

Reviewers: jasonbcox, Fabien, #bitcoin_abc, deadalnix

Reviewed By: jasonbcox, #bitcoin_abc

Differential Revision: https://reviews.bitcoinabc.org/D3237

src/test/data/script_tests.json

@@ -469,11 +469,6 @@
 ["", "0 0 0 1 CHECKMULTISIG VERIFY DEPTH 0 EQUAL", "P2SH,STRICTENC", "OK", "Zero sigs means no sigs are checked"],
 ["", "0 0 0 1 CHECKMULTISIGVERIFY DEPTH 0 EQUAL", "P2SH,STRICTENC", "OK"],
 
-["", "0 0 0 CHECKMULTISIG VERIFY DEPTH 0 EQUAL", "P2SH,STRICTENC", "OK", "CHECKMULTISIG is allowed to have zero keys and/or sigs"],
-["", "0 0 0 CHECKMULTISIGVERIFY DEPTH 0 EQUAL", "P2SH,STRICTENC", "OK"],
-["", "0 0 0 1 CHECKMULTISIG VERIFY DEPTH 0 EQUAL", "P2SH,STRICTENC", "OK", "Zero sigs means no sigs are checked"],
-["", "0 0 0 1 CHECKMULTISIGVERIFY DEPTH 0 EQUAL", "P2SH,STRICTENC", "OK"],
-
 ["", "0 0 'a' 'b' 2 CHECKMULTISIG VERIFY DEPTH 0 EQUAL", "P2SH,STRICTENC", "OK", "Test from up to 20 pubkeys, all not checked"],
 ["", "0 0 'a' 'b' 'c' 3 CHECKMULTISIG VERIFY DEPTH 0 EQUAL", "P2SH,STRICTENC", "OK"],
 ["", "0 0 'a' 'b' 'c' 'd' 4 CHECKMULTISIG VERIFY DEPTH 0 EQUAL", "P2SH,STRICTENC", "OK"],