Tests: Remove unused file from Tutorial Step7 test

The `build2.cmake` script looks like it was accidentally
committed after being created for local testing.

Tests/Tutorial/Step7/build2.cmake

-set(CTEST_SOURCE_DIRECTORY "$ENV{HOME}/Dashboards/My Tests/CMake/Tests/Tutorial/Step7")
-set(CTEST_BINARY_DIRECTORY "${CTEST_SOURCE_DIRECTORY}-build2")
-set(CTEST_CMAKE_GENERATOR "Visual Studio 8 2005")
-
-CTEST_START("Experimental")
-CTEST_CONFIGURE(BUILD "${CTEST_BINARY_DIRECTORY}")
-CTEST_BUILD(BUILD "${CTEST_BINARY_DIRECTORY}")
-CTEST_TEST(BUILD "${CTEST_BINARY_DIRECTORY}")
-CTEST_SUBMIT()