properly build cpp wheels (#51452)

cherrypick #51450

Signed-off-by: Lonnie Liu <[email protected]>

Author: aslonnie

python/setup.py

@@ -33,7 +33,6 @@
 
 ROOT_DIR = os.path.dirname(__file__)
 BUILD_JAVA = os.getenv("RAY_INSTALL_JAVA") == "1"
-BUILD_CPP = os.getenv("RAY_INSTALL_CPP") == "1"
 SKIP_BAZEL_BUILD = os.getenv("SKIP_BAZEL_BUILD") == "1"
 BAZEL_ARGS = os.getenv("BAZEL_ARGS")
 BAZEL_LIMIT_CPUS = os.getenv("BAZEL_LIMIT_CPUS")
@@ -702,7 +701,7 @@ def pip_run(build_ext):
     if SKIP_BAZEL_BUILD:
         build(False, False, False)
     else:
-        build(True, BUILD_JAVA, BUILD_CPP or BUILD_JAVA)
+        build(True, BUILD_JAVA, True)
 
     if setup_spec.type == SetupType.RAY:
         setup_spec.files_to_include += ray_files