Ninja: Use clean target instead of clean tool in `cmake --target clean` calls

A convenience `clean` target for the Ninja generator exists since commit
3bd41f2eb5.  It's safe to call `ninja clean` instead of `ninja -t clean`.
This removes the exception mapping of the `clean` target in
`cmake --build ... --target clean` calls to the Ninja `-t clean` tool.

1 files changed, 1 insertions, 5 deletions

diff --git a/Source/cmGlobalNinjaGenerator.cxx b/Source/cmGlobalNinjaGenerator.cxx
index 760a5ab..1b973e0 100644
--- a/Source/cmGlobalNinjaGenerator.cxx
+++ b/Source/cmGlobalNinjaGenerator.cxx
@@ -679,11 +679,7 @@ cmGlobalNinjaGenerator::GenerateBuildCommand(
   makeCommand.Add(makeOptions.begin(), makeOptions.end());
   for (const auto& tname : targetNames) {
     if (!tname.empty()) {
-      if (tname == "clean") {
-        makeCommand.Add("-t", "clean");
-      } else {
-        makeCommand.Add(tname);
-      }
+      makeCommand.Add(tname);
     }
   }
   return { std::move(makeCommand) };