cmake: stop looking for REFTABLE_TEST_OBJS in the Makefile

As of 15e29ea (t: move reftable/stack_test.c to the unit testing
framework, 2024-09-08), the reftable tests are no longer part of
`test-tool.exe`, so let's stop looking for those lines that are no
longer in the `Makefile`.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: dscho

contrib/buildsystems/CMakeLists.txt

@@ -970,10 +970,6 @@ if(BUILD_TESTING)
 add_executable(test-fake-ssh ${CMAKE_SOURCE_DIR}/t/helper/test-fake-ssh.c)
 target_link_libraries(test-fake-ssh common-main)
 
-#reftable-tests
-parse_makefile_for_sources(test-reftable_SOURCES "REFTABLE_TEST_OBJS")
-list(TRANSFORM test-reftable_SOURCES PREPEND "${CMAKE_SOURCE_DIR}/")
-
 #unit-tests
 add_library(unit-test-lib OBJECT ${CMAKE_SOURCE_DIR}/t/unit-tests/test-lib.c)
 add_library(unit-test-lib-oid OBJECT ${CMAKE_SOURCE_DIR}/t/unit-tests/lib-oid.c)
@@ -1062,7 +1058,7 @@ parse_makefile_for_sources(test-tool_SOURCES "TEST_BUILTINS_OBJS")
 add_library(test-lib OBJECT ${CMAKE_SOURCE_DIR}/t/unit-tests/test-lib.c)
 
 list(TRANSFORM test-tool_SOURCES PREPEND "${CMAKE_SOURCE_DIR}/t/helper/")
-add_executable(test-tool ${CMAKE_SOURCE_DIR}/t/helper/test-tool.c ${test-tool_SOURCES} ${test-reftable_SOURCES})
+add_executable(test-tool ${CMAKE_SOURCE_DIR}/t/helper/test-tool.c ${test-tool_SOURCES})
 target_link_libraries(test-tool test-lib common-main)
 
 set_target_properties(test-fake-ssh test-tool