Build

Remove ram setting from makefile as it causes errors in nanos #683

Job	Run time
build	1m 18s
configure	1s
clippy	1m 24s
rust_tests	1m 26s
tests_zemu_setup	42s
build_ledger	1m 21s
test_zemu (0, /home/runner/work/ledger-icp/ledger-icp/tests_zemu/tests/candid.test.ts)	9m 46s
test_zemu (1, /home/runner/work/ledger-icp/ledger-icp/tests_zemu/tests/protobuf.test.ts)	7m 40s
test_zemu (2, /home/runner/work/ledger-icp/ledger-icp/tests_zemu/tests/bls.test.ts)	3m 55s
test_zemu (3, /home/runner/work/ledger-icp/ledger-icp/tests_zemu/tests/standard.test.ts)	4m 49s
test_zemu (4, /home/runner/work/ledger-icp/ledger-icp/tests_zemu/tests/addresses.test.ts)	4m 25s
size_nano_s	1s
build_package_stax	0s
build_package_nanos	0s
build_package_flex	0s
build_package_nanosp	0s
	36m 48s

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