Remove `_IMPL` from macro names #151

Job	Run time
build (--disable-openmp, --with-yaml, --enable-deprecated-io)	13m 34s
build (--disable-openmp, --with-yaml, --disable-deprecated-io)	10m 46s
build (--disable-openmp, --enable-test-input=/home/unit_tests_input, --enable-deprecated-io)	11m 37s
build (--disable-openmp, --enable-test-input=/home/unit_tests_input, --disable-deprecated-io)	11m 28s
build (--enable-mixed-mode, --with-yaml, --enable-deprecated-io)	12m 38s
build (--enable-mixed-mode, --with-yaml, --disable-deprecated-io)	10m 47s
build (--enable-mixed-mode, --enable-test-input=/home/unit_tests_input, --enable-deprecated-io)	13m 11s
build (--enable-mixed-mode, --enable-test-input=/home/unit_tests_input, --disable-deprecated-io)	11m 19s
build (--disable-setting-flags, --with-yaml, --enable-deprecated-io)	12m 49s
build (--disable-setting-flags, --with-yaml, --disable-deprecated-io)	11m 34s
build (--disable-setting-flags, --enable-test-input=/home/unit_tests_input, --enable-deprecated-io)	11m 32s
build (--disable-setting-flags, --enable-test-input=/home/unit_tests_input, --disable-deprecated-io)	11m 7s
build (--with-mpi=no, --with-yaml, --enable-deprecated-io)	5m 15s
build (--with-mpi=no, --with-yaml, --disable-deprecated-io)	4m 29s
build (--with-mpi=no, --enable-test-input=/home/unit_tests_input, --enable-deprecated-io)	4m 41s
build (--with-mpi=no, --enable-test-input=/home/unit_tests_input, --disable-deprecated-io)	5m 35s
	2h 42m 22s

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