Tests: Drop test for VS 7.0 generator deprecation warnings

We removed this generator but forgot to remove this now-unused test
case.

Tests/RunCMake/CommandLine/DeprecateVS70-WARN-ON-stderr.txt

-^CMake Warning:
-  The "Visual Studio 7" generator is deprecated and will be removed in a
-  future version of CMake.
-
-  Add CMAKE_WARN_VS70=OFF to the cache to disable this warning.$

Tests/RunCMake/CommandLine/RunCMakeTest.cmake

@@ -72,13 +72,6 @@ if(RunCMake_GENERATOR STREQUAL "Ninja")
   unset(RunCMake_TEST_NO_CLEAN)
 endif()
 
-if(RunCMake_GENERATOR STREQUAL "Visual Studio 7")
-  set(RunCMake_WARN_VS70 1)
-  run_cmake(DeprecateVS70-WARN-ON)
-  unset(RunCMake_WARN_VS70)
-  run_cmake(DeprecateVS70-WARN-OFF)
-endif()
-
 if(UNIX)
   run_cmake_command(E_create_symlink-no-arg
     ${CMAKE_COMMAND} -E create_symlink

Tests/RunCMake/RunCMake.cmake

@@ -51,9 +51,6 @@ function(run_cmake test)
   if(APPLE)
     list(APPEND RunCMake_TEST_OPTIONS -DCMAKE_POLICY_DEFAULT_CMP0025=NEW)
   endif()
-  if(RunCMake_GENERATOR STREQUAL "Visual Studio 7" AND NOT RunCMake_WARN_VS70)
-    list(APPEND RunCMake_TEST_OPTIONS -DCMAKE_WARN_VS70=OFF)
-  endif()
   if(RunCMake_MAKE_PROGRAM)
     list(APPEND RunCMake_TEST_OPTIONS "-DCMAKE_MAKE_PROGRAM=${RunCMake_MAKE_PROGRAM}")
   endif()