remove mentions of go-ethereum

graphql/graphql_test.go

les/state_accessor.go

oss-fuzz.sh

tests/fuzzers/bitutil/compress_fuzz.go

tests/fuzzers/bls12381/bls_fuzzer.go

tests/fuzzers/difficulty/debug/main.go

tests/fuzzers/difficulty/difficulty-fuzz.go

tests/fuzzers/les/debug/main.go

tests/fuzzers/les/les-fuzzer.go

tests/fuzzers/rangeproof/debug/main.go

tests/fuzzers/rangeproof/rangeproof-fuzzer.go

tests/fuzzers/runtime/runtime_fuzz.go

tests/state_test_util.go